From the beginning of the series, it is evident that Duncan and Courtney are polar opposites, which causes a great deal of conflict between both of them during the first few episodes of Total Drama Island. In spite of this, they are often paired up together in challenges, which sometimes leads to insinuations that Courtney has feelings for him, which she steadfastly denies. Duncan, on the other hand, never denies that he is attracted to Courtney, and he, along with his friends, often accuse Courtney of wanting him as well. Despite the fact that she criticizes him at every opportunity, Courtney eventually shows signs of having a secret crush on Duncan, and there are indications of a mutual attraction growing between the two. This romantic tension eventually culminates in the two of them kissing in Basic Straining, with her displaying a more relaxed attitude towards the competition from Duncan's influence. However, any hope of the two competing alongside each other for the rest of the season is dashed when Courtney is voted off in that same episode, due to Harold tampering with the votes, as revenge for Duncan's bullying when he sees the two kissing. Signs of Duncan and Courtney having feelings for each other continue to be shown in many episodes after Courtney's elimination and well into the second season.
Courtney initially does not qualify for Total Drama Action while Duncan does. During Courtney's absence, Duncan becomes good friends with Gwen, but Courtney assumes that he is cheating on her. Duncan does show that he misses Courtney as he slept with a picture of her under his pillow and thinks of her when he is stargazing with Gwen. When Courtney returns in Ocean's Eight - Or Nine, the two of them put their relationship aside and become enemies again as they are on different teams. This is also because Duncan is angry at the unfair advantages Courtney has while Courtney is angry at his and Gwen's friendship. Despite this, Duncan is unable to hold his feelings for her back and he lost to her in several challenges despite his great achievements before her return. Eventually, the two of them made up in Top Dog, but Courtney also imposes a set of overbearing rules on their relationship, expecting Duncan to completely memorize and follow them if they ever want to have a serious relationship. Because of this, Duncan votes Courtney off and they broke up. However, after the season finale, the two of them reconcile as a couple. They were shown in Celebrity Manhunt's Total Drama Action Reunion Special to have broken up again, but they got back together by the end of the episode after a kiss on the bus.
When season three starts, Duncan and Courtney are still a couple, although Duncan is slowly losing interest in her due to her bossiness and control over him. At the same time, he starts to develop romantic interest towards Gwen. Courtney is also angry at Gwen, thinking she has a crush on Duncan. The argument between both girls is what causes Duncan to quit the season. Despite these initial feelings of distrust, Gwen and Courtney eventually develop a friendship in the absence of Duncan, who quit the season in the first episode. During his absence, Courtney constantly shows signs of missing Duncan, but tries not to let it affect her competitiveness. However, Duncan eventually returns to the competition in I See London..., and Courtney's worst fears are realized when Gwen and Duncan share a kiss at the end of that episode. Courtney remains unaware of the kiss until the end of Greece's Pieces, when Tyler is forced by Alejandro to tell everyone about it, since he was the one who accidentally witnessed the event in the confessional. Courtney is devastated and heartbroken by this news, and it destroys her friendship with Gwen, as well as her relationship with Duncan. Courtney officially breaks up with Duncan in The EX-Files, after she dumps a bowl of spaghetti on his head and kicks him in the groin for cheating on her. He and Gwen will then start a relationship in the same episode. After Courtney is able to eliminate Gwen in Picnic at Hanging Dork, Duncan's hatred for Courtney intensifies and the two of them argue even after Gwen's elimination. Courtney also moves on from her relationship with Duncan, and starts to be attracted to Alejandro. From here on, the two of them return to being fierce enemies.
When Total Drama All-Stars starts, Duncan is still in a relationship with Gwen, while Courtney is still feeling resentful to the two of them. Many times during the season, Duncan tries to grab Courtney's attention but Courtney would completely ignore him. After Gwen breaks up with Duncan due to him still showing a lot of interest for Courtney, she and Courtney become friends again and tease Duncan several times. Meanwhile, Duncan finds out that an old enemy of his has returned and tries to warn both his ex-girlfriends, but the two of them refuse to listen to him, which eventually leads to their downfall when Mal begins targeting the contestants.
After the challenge is over, the Killer Bass have a meeting at the main lodge to discuss who should they vote for. Duncan immediately suggest that they vote off either Courtney or DJ since they refuse to jump off the cliff during the first challenge; their ineptitude plays a large role in the Killer Bass team ultimately losing. Duncan however quickly redeemed DJ, finding his strength to be more valuable than Courtney's CIT experience. Courtney quickly tries to discard that idea by throwing Tyler under the bus, however Duncan stays firm with wanting Courtney gone.
As the Killer Bass are on the verge of losing again, Courtney suggest that they wake up Duncan, who has been on the sidelines since the beginning as he is still tired from the Awake-a-thon in the previous episode. When the enraged Duncan woke up, Courtney came forward to explain their situation. When Duncan asked why he should help them, Courtney responded by saying if he refused to participate in the game, she would personally guarantee that he would be the one voted off the island if their team lost again. The threat was enough to force Duncan into playing, which won the Killer Bass the challenge.
Duncan and Courtney fought over leadership of the team during the Wilderness Survival Challenge. When the map and compass are given to Duncan, Courtney snatches them away almost instantly and shoots him a dirty look. While Courtney is pitching a tent, Duncan walks up to her and mockingly asks her what's for dinner, calling her "woman" in a derogatory manner. Courtney is disgusted with this, and refuses to dignify Duncan's question with a response. Later on, Courtney scolds Duncan for scaring the entire team with his fake hook. A sudden wolf cry frightens Courtney, and she automatically runs into Duncan's arms, which Geoff gives a thumbs-up towards.
After Bridgette accidentally destroy their team's tent, forcing them to sleep under the rain, it is revealed that Courtney had subconsciously cuddled with Duncan in her sleep.When she wakes up, she is disgusted by what has happened and blames Duncan for it, but Duncan sarcastically says that it was her trying to make a move on him. After the campfire ceremony, the two of them had a talk which ended after Duncan brings out his fake hook again to prove to Courtney after she claims that she is not afraid of anything. Enraged, she stands up and stomps off, telling Duncan that she hates him. However, an amused Duncan tells the audience that he is certain that she doesn't mean what she says.
While the campers are discussing about their greatest fear, Courtney adamantly claims that she isn't afraid of anything, but no one - especially Duncan - believes her, as he reminds her about how badly he scared her last night. Courtney is quick to tell him to shut up, but also makes fun of Duncan when he reveals his worst fear: Céline Dion music store standees. The challenge of the episode is for every camper facing their fears and when it is Duncan's turn, Courtney hold his hand and tells him to be brave. This assurance seems to greatly aid Duncan as he manages to conquer his fear and hug the standee. Courtney cheers for his success and hugs, only to quickly let go when the others gather around to congratulate him.
Duncan and Courtney are designated as deer to be hunted for this episode's challenge, and they spend most of the episode apart from each other. Near the end of the episode, Courtney crosses paths with Duncan on her way back to Camp Wawanakwa. Following an argument about which way the campsite was, Duncan and Courtney's antler caps tangle together when they pass by each other. After giving up, Courtney angrily asks what they're supposed to do next and Duncan asks if she wants to make out with him. Courtney's face suddenly goes blank, suggesting her "answer" as a no-go. The two eventually make it back to camp, still attached to each other, where everyone is waiting. After Gwen and Owen make comments on the compromising position between the two, Duncan slyly claims that the girl can't keep her antlers off him. In response, Courtney kicks him in the crotch. Due to the fact that they were stuck together at the time, Duncan is especially reeling in pain since he can't even bend over.
Duncan and Courtney are paired up to cook the cannoli during the cooking challenge to which Duncan happily complies. Geoff, the Head Chef, tries to appeal to Courtney as he and Duncan give her an innocent, pleading look, which causes Courtney to reluctantly accept. Throughout the episode, Courtney constantly complains about Duncan in the confessional and all his traits that annoy her (including his mohawk) to the point that her confessionals have to be fast-forward through bits of her ranting. She even mention that the possibility of them becoming a couple is very unlikely. At one point, the two exchange several minor insults which resulted in them pouring custards on each other. Although their dish did not receive high points, their team still wins. As the team celebrates, Duncan embraces Courtney but she demands him to put her down.
As the campers are having breakfast, Courtney confronts Duncan for stealing a mug. While she claims that she didn't want him to get kicked off the island for stealing camp property, Duncan flattery explains that Courtney likes him and is actually worry about his welfare. Courtney once again denies it and walks away. Later that day, while Courtney is at the medic tent after getting knocked out, she spots Duncan luring over a rabbit with a carrot. Wondering what is he up to, Courtney decides to investigates and found out that Duncan is trying to find a new rabbit for DJ, after the first one was lost while under Geoff's care. Seeing Duncan's action made Courtney realizes that Duncan is actually a nice guy deep down. After the challenge has ended, Courtney talks to Duncan about his action but he tried to brush him off. Duncan eventually admitted to Courtney and ade Courtney promise not to tell anyone about what he did, not wanting the other campers to get the idea that he was a nice guy. Courtney assured Duncan that his secret was safe with her.Chef Hatchet's grueling challenges or when he once again pull pranks on Harold. Each time Courtney does so, Duncan teases her by saying she must really like him to be so insistent on him following the rules, but Courtney uses the same rebuttal as before: she simply doesn't want her team to lose the challenge. At one point, Courtney comes close to spilling Duncan's secret from the previous episode, but takes it back and assures Duncan's peers that he's every bit as nasty and mean as he wants others to believe. After Duncan was sent to the boathouse by Chef, Courtney is concern for him and decides to visit Duncan and bring some food for him. Geoff tries to point out to her she indeed has a crush on Duncan which she vehemently denies, claming that she can't stand Duncan for all his annoying qualities.
At the boathouse, the two of them had a long talk about each other's behaviour until Duncan convince Courtney to break the rules and raid Chef's fridge. The two manage to steal a sack full of food and brought it back to the other campers. After eating, Courtney and Duncan had another conversation together to which Duncan compliments Courtney for her new "dark side." After a while, Courtney pulls Duncan and kisses him before she leaves for bed. Duncan's fellow men congratulate him on finally winning Courtney over, with Duncan casually saying he knew all along that Courtney wanted him. After the challenge is over the next day, Duncan was shocked to find out that Courtney is eliminated. Before she leaves, the two bid each other goodbye and Duncan give her a wooden skull that he carved. Although Courtney finds it weird and creepy, she loves it, and waves goodbye to Duncan; she promises she would never forget him. Unknown to everyone else, it was revealed that Harold had tampered the votes in orer to get back at Duncan for bullying him.
Though most campers voted Eva off the island right after her surprise return, Duncan was one of the few who did not. He voted for Heather instead, suspecting her to be the one behind Courtney's elimination. He gives her a shout-out afterward, saying he misses her and calls her "babe." However, he pinned the blame on the wrong person, as Heather had nothing to do with Courtney's elimination, both in being on the other team and not doing any intentional manipulation of the game to eliminate her.
While handcuffed to Leshawna, Duncan was cornered by her about his hidden softer side, which Duncan vehemently denies. Leshawna then brings up his relationship with Courtney, who told her about the situation with DJ's bunny (something Courtney originally promised to keep a secret), leaving Duncan with no choice, but to explain his reasoning and his softer side.
During the last challenge, while the campers are making a totem pole using carved wooden heads of all the previously eliminated contestants and stack them in order from the first camper eliminated to the most recent camper eliminated, Chris caught Duncan carving a heart with "D+C" behind a wooden head Courtney's head. As Chris laugh at him for begin soft, Leshawna defends Duncan by throwing one of the wooden heads at Chris.
Courtney admits to the cameramen that she hoped Duncan would win the competition and that she really likes him; something that everyone else overhears and teases Courtney for, considering that she went so long denying her feelings for him. Courtney also forces Harold to vote for Duncan to win (though it is obvious he doesn't plan on doing so). Harold says "I vote for Duncan. Not!"
Duncan and Courtney are among the eliminated contestants who sided with Owen for the final competition. At one point, the two have an argument concerning about Owen and Gwen's safety which ended up with them making out while still claiming that they hate each other.Playa Des Losers celebrating, Courtney is embarrassed at Duncan's horrible dancing moves and tells him to stop. Duncan tells her to cheer up but Courtney explains how she lost the competition and the lawsuit she filed against the producers for unfair termination of competition and now she just wants to return home to her normal school life. Just then, Chris announce of the extra challenge and Courtney's mood greatly improves. She immediately pulls Duncan into an alliance so they can find and share the money together. The two of them manage to retrieve the million dollar case after Duncan used a fishing hook to snag it away from Lindsay's group and wrestled an alligator that eat it moments later. Unfourtunately for Duncan, Courtney reveals her greedy nature to him and abandon an injured Duncan, using the excuse that she can't have him slowing her down. The two would not meet up again until they return to the campgrounds in which Courtney cheers for Duncan while he is fighting another animal, this time a moose. Still furious of her earlier betrayal, Duncan responded that he would come for her next in an almost-threatening and vengeful tone. After several events later, Duncan is qualified for Total Drama Action while Courtney isn't, making her mad again.
In the Total Drama Action version of the opening sequence, Courtney first scowls at Duncan for shooting Harold with seagulls, but then makes out with him, and pulls away grinning deviously at Harold's misfortune while Duncan appears both happy and surprised.
It is revealed by Gwen that Duncan keeps a picture of Courtney under his pillow, strongly indicating that he still has feelings for her.
Duncan reveals that he has found out that Harold has rigged the votes last season which resulted in Courtney's elimination which is the reason why he continues to relentlessly pick on Harold this season as payback.
Courtney grows jealous when Trent reveals that Gwen and Duncan have been hanging out. Trent has had similar feelings, directing his anger at Duncan, but at this point, Courtney seems to also be angry at Duncan rather than Gwen.
When Gwen mention to Geoff that Duncan didn't vote her off, Courtney immediately stands up and yells that was because Gwen had her "goth girl hooks" into him. Gwen then explained that her and Duncan are only friends. Geoff then showed a never before seen clip of Duncan and Gwen stargazing. When Duncan, with a dreamy expression, ask her if Courtney is looking at the stars, Gwen playfully make a disgust face. Geoff pauses the clip and Courtney has a happy look on her face as Gwen tells her that Duncan always thinks about her. Geoff however, resumes playing the clip where it was shown while the two of them are playfully rough housing, they fell onto the ground with Duncan landing on top of her. Geoff points out how close Gwen and Duncan's lips are from each other as if they are about to kiss. Despte Gwen insist that they are just friends, Courtney angrily leaves to call her lawyers.
Once the Gaffers reach the bank and are about to rob it, Duncan was shocked to find out that the teller was actually a returning Courtney in disguise. After Courtney remove her blonde wig, Duncan immediately faint upon seeing her. Chris gives her the option of who deserved to win the bank money as first prize, and she said that the Gaffers (preferably Duncan) deserved it for getting to the bank first and happily gave Duncan the money. Duncan seemed extremely nervous when she gave it to him and said "Thank you" in a squeaky voice. While assembling their go-cart, Duncan stared at Courtney constantly, and he ended up hurting his hand since he wasn't paying attention to what he was doing. When the Gaffers completed their kart and started to drive off, Duncan stopped in front of Courtney and teases her for having problems on her first day.
Despite the fact that they still care about each other, Duncan and Courtney seem to have developed a competitive/hateful attitude toward each other. After Chris tells the castmates about "Courtney's rules" Duncan begins to mock his girlfriend while Courtney brings up about him cheating on her with Gwen while she wasn't around. After a several insults and sarcastic remarks, the two of them start to growl at each other with their teeth bared. During the first challenge, Duncan calls Courtney a drama queen when she brings up her C.I.T. experience again and Courtney retaliates mentioning his friendship with Gwen again. When Duncan successfully starts a fire faster than Courtney, he proceeds to taunt her. However, Chris caught him cheating and award the first challenge to the Grips instead. Immediately, Courtney mocks Duncan for his cheating and then whacks him with her bone after she received it. The two of them are pitted against each other. At the beginning, Courtney is holding onto Duncan to regain her balance to which Duncan sees as her trying to make out with him but Courtney silence him by threatening him. When Chris sounds the horn, the two almost lose their balance and ended up kissing each other after Courtney grabs Duncan's wrist to pull herself up. While the two of them compliment the other in their respective confessions, Courtney is still angry at Duncan. As the two begin to lean in for another kiss, Courtney immediately use the opportunity to hit Duncan in the groin, giving her team the victory.
Duncan and Courtney are again pair up with each other where they had to wrestle in a ball pit. Courtney admits in the confessional that she has no problem fighting Duncan. In his confessional, Duncan believes that it will be an easy win but admits he will not go easy on Courtney as he doesn't want their relationship to end up like Trent and Gwen's. Once the challenge begins, Courtney aggressively attack Duncan, giving him no chance to counter back. Although Duncan at one point manage to gain the upper hand, Courtney immediately regain control and force Duncan to submit. At the Gilded Chris ceremony, Chris pokes fun at Duncan for losing to a girl in a match of wrestling. Duncan then states that she wasn't "a girl," she was Courtney, and it was a whole other thing.
When Duncan is hit by a tranquilizer dart and falls into a pit with Lindsay, Courtney immediately rushes to his side in worry, and calls him by the affectionate term, "Dunky" which Harold finds odd. Shortly after, Courtney is hit by a bowler hat and falls into the pit with Duncan and Lindsay. After the contestants find themselves in a cave, Duncan can be seen looking at Courtney, who just woke up. The first challenge of the day was to reach a case with a small bag inside without getting hit by the many lasers guarding it. Duncan noticeably stared at Courtney while she was sliding through the lasers, howling like a wolf in response. Suddenly, Chris announces that the building they are in is about to explode, to which Courtney immediately hugs Duncan. However, Chris reveals that he was just joking and Courtney immediately pushes Duncan away, claiming that she was giving him a "pity hug."
In the recap, Chris wonders if Duncan will win back Courtney. While trying to decide who they should vote off Justin mentions they should vote off Courtney since she is the biggest threat but Duncan states that she has invincibility and choose to vote off Leshawna instead. In order to make sure Harold helped them, Duncan visits Courtney at the girl cabin to help him persuade Harold. Meanwhile, the girls wanted to vote off Duncan in order to make Courtney mad.
When Courtney sings a brief ballad in the second challenge, Duncan is entranced and agrees with Justin calling her the "most beautiful girl ever." But then he gets mad when he realizes that Justin is falling for Courtney. Justin and Duncan try to be the "perfect prince" according to Courtney's song. Later, when Justin is flirting with Courtney, Duncan calls him "Sir Suck-Up" and Courtney says that he could learn from Justin that it's nice to get a compliment every once in a while. When Courtney is "kidnapped" by Chef, she says she wanted Justin to rescue her. Duncan gets jealous and tries to give her a compliment, saying that he likes Courtney's face. Courtney, however, ignores him.
At the tower she is in, Courtney gives each knight an air-kiss though seemed less than enthusiastic about having to send Duncan an air kiss in the first place. While Duncan stole Harold's, Justin stole his. Duncan an Justin begin to compete for Courtney's affection but Justin wins the challenge with Harold's help. As Justin and Courtney are about to kiss, Chris stops them, much to Duncan's relieved. At the Award Ceremony, Courtney was furious when she thought Duncan is eliminated before Chris states that he was joking and Justin is eliminated instead. Duncan noticed Courtney is upset of him getting eliminated though she admits in the confessional that she doesn't want her hard work off getting Justin to throw the challenge for her go to waste.bossy attitude towards her, Lindsay chooses Duncan as her date for the movies in order to make Courtney jealous and Duncan goes along with Lindsay's plan. Despite the awkwardness between the two, the plan works and Courtney begin to cry hysterically despite trying the deny that she isn't jealous.
During the guitar-playing challenge, Courtney and Duncan are the final two contestants left standing. Courtney plays skillfully, even behind her head, on her knees, and with her teeth, while Duncan only hits every other note and then smashes his guitar on the stage. Duncan ends up winning because Chris says Courtney tried too hard. Duncan then taunts her of his victory but Courtney immediately hits Duncan's groin in retaliation.
In the end Courtney wins the challenge and Beth, Lindsay, and Harold tries to vote off Duncan like before to make Courtney angry. However, Lindsay was distracted during the voting and voted herself instead, making Duncan safe and Lindsay eliminated.
Duncan and Courtney are pitted against each other again during the first part of the challenge with them controlling Harold and Beth respectively (who are wearing robot suits). As the fight become intense, Duncan and Harold wins after Courtney broke her joystick and Beth is unable to respond to Harold's attack.
During the first challenge, Courtney is jealous when Duncan gives his pillow to his pet spider, Scruffy, rather than giving it to her; but by the last challenge, when Scruffy is accidentally crushed and killed by Harold, Courtney tries to console a heartbroken Duncan by patting him on the back and saying that Scruffy is "in a better place." She then adds that it is certainly a better place than the film lot. It is later revealed in the confessional that Courtney is happy that Scruffy is gone, because now, Duncan can focus more on someone with "less hairy legs" (meaning her), something which clearly shows her recomposing endearment for Duncan.
After Duncan went crazy from being in the woods too long, Courtney's kiss snapped him out of it. Duncan, irritated by the thirty-two page letter, and stating that he is not willing to give up a million dollars for her, votes Courtney off. Courtney tells Duncan that their relationship is over when she is being taken to the Lame-O-Sine. In the exclusive clip, Courtney reveals that if Duncan wins, he would had to share his winnings with him as he had signed a contract with her.
The final question asked by Chris to the finalist is about Courtney and if answer correctly, they are allowed to skip the final challenge. In the confessional, Duncan was relieved since that he know Courtney more than the other contestants due to their history and their relationship. When Beth is unable to figure out what band Courtney used to be a part of, Duncan gave the correct ("The Type-A Psychotic Crazies"). However, Chris states that the question is for Beth and his question is "What color is Courtney thinking of right now?". Duncan, though indignant at the ridiculous question, took a shot at answering it anyway, and guessed the wrong color (blue). Courtney is watching this from the Aftermath studio and was furious that he doesn't know that the answer was burnt sienna.Top Dog, Courtney is shown to be Duncan's biggest supporter in this episode. When Courtney suggests that the tie should be broken by an "unbiased" quiz she designed, she winks at Duncan, implying that she intended for the quiz to be biased towards him. However, her idea was immediately rejected by the other contestants.
In Duncan's ending, Courtney immediately hugged Duncan and states that they're rich. Duncan hesitates at first, saying he never said he agree to share his money with her. However, Courtney then kisses him and tells him that "every king needs a queen" to which Duncan immediately complies to Courtney's suggestion.
Brittany. However, it wasn't long that they broke up again during dinner at a restaurant. At a press conference, Courtney kept ranting about all the disagreeable traits she found with Duncan but Duncan declined to take part in the press conference and simply kept replying with "no comment." It was also revealed that Courtney is suing Duncan over custody of Brittany. When they meet each other again at the Gemmies, they continue to ignore each other. Later, while the contestants are chasing the "Total Drama Dirtbags" cast, the two get into a heated argument about Courtney driving too slow. However, they eventually stop arguing to stare into each other's eyes, and suddenly begin kissing, unable to deny their feelings for each other any longer. Unfortunately, since Courtney happened to be driving the bus at the time, the bus veers off the road towards a cliff. As they are falling, Courtney and Duncan embrace each other in fear. Luckily the cast survives the fall and Duncan and Courtney are one of the few who are qualify for Total Drama World Tour. In the confessional, Courtney expresses distrust for Gwen, worried that she'll be a "boyfriend stealer" and try to steal Duncan away from her. Courtney states that she'll keep an eye on her in the third season.
In Beth's ending, Duncan offers a hand to a visibly disappointed Courtney sitting on the couch and asks her out to dinner. Although Courtney initially insist that she doesn't "usually eat with losers" she accepts it. As they are about to leave, Courtney pulls out her PDA and promise to sue the show for "election fraud," since she believes that he should have won.
In the Total Drama World Tour opening sequence, Duncan and Courtney are seen together on a boat. Duncan throws an oar at Harold (who was posing on the roof of the boat) and knocks him out. Duncan laughs hysterically at Harold's misfortune, while Courtney smiles at Duncan. They then crash into an inflatable raft carrying Gwen. Duncan grins at Gwen until he notices that her raft is sinking. He then looks down with a look of worry at Gwen, then turns around and sheepishly grins at a glaring Courtney.
As Chris introduces the third season's contestants at the beginning of the episode, Courtney is introduced first, followed immediately by Duncan. Duncan is seen carrying Courtney's backpack for her, and seems to have no objections to doing so. However, after Gwen smiles at Duncan because of a joke he made about Heather, Duncan grins back at Gwen, causing Courtney to glare at Duncan disapprovingly. During the Come Fly With Us musical number, Duncan is shown to be extremely reluctant to participate. Courtney begs him to do it though, since she doesn't want to see him be eliminated so early. Due to Courtney's sincere pleading, he gives in and sings the final line of the musical number.
Later, in the "Pyramid Over Under" challenge, Courtney pairs up with Duncan. She prepares a belay for her and Duncan, stating that rock climbing was the team-building challenge when she was a C.I.T., and that her "superior belay skills" will assure victory for the two of them. However, after Duncan sees Gwen having trouble scaling the pyramid by herself, Duncan tries to get Courtney to invite her into the team, which Courtney reluctantly agrees to, citing that a "three-person belay is stronger.” While climbing the pyramid, Courtney comments on Gwen's "appalling" form of rock climbing, which Gwen sarcastically thanks her for noticing. The two girls bicker the entire time while climbing, much to Duncan's annoyance. Once the trio gets to the top of the pyramid, Courtney and Gwen get into another argument over whether they should untie themselves or not. After Chris shouts at them that the three of them have to sing a reprieve of their earlier musical number due to not finishing in time, Duncan snaps and angrily goes down the pyramid, dragging Courtney and Gwen down with him. When Duncan quits, Courtney gasps in shock, clearly disappointed that he's not going to be by her side for the rest of the competition.
At the beginning of the episode, the girls of Team Amazon were discussing Duncan's disqualification in the previous episode. After Heather expresses her belief that Duncan "can't sing,” Courtney is quick to stand up for him, stating that Duncan "can do anything he sets his mind to.” She then shows compassion about his current well-being, worried that he's feeling miserable due to being stuck on the airplane waiting for a ride home. As she does so, she calls him "poor thing" in an endearing manner. Moments later, Sierra makes an offhanded remark to Izzy about how Duncan and Courtney are the most popular couple on the show, according to the readers of her Total Drama fansite.
Later in the episode, during the race to the Nile, Alejandro tries to get on the good side of the girls of Team Amazon, referring to them as "fiercely intelligent women" after they toss some insults towards his team. Courtney dismisses his attempts at flattery, quickly pointing out to him that she's with Duncan. Alejandro persists though, and replies that it's a pity that she's given herself to a "quitter who doesn't deserve her.” This catches Courtney off-guard, and she stammers as she tries to respond, implying that she perhaps believes at least some of what Alejandro is saying. Wanting to escape the situation, she yells to the camel she's on to go faster.
During Sea Shanty Mix, Courtney is pointed by Gwen towards seeing something that looks like Duncan on a rock sailing to the Newfoundland coast. When they head there, Courtney appears to be happy to have found him until discovering it's merely a rock that looks like Duncan. When Sierra implies that Courtney depicted a strangely-shaped rock as Duncan because when a person misses someone a lot they start seeing them even though they aren't there for real. Courtney agrees that she misses him a lot, but also states that this doesn't make any sense since Gwen "saw him" too. In the confessional she said she was mad at him for "abandoning" her. She then states that she messed up (something Courtney would never do) but catches this and tries to get the tape back.Changing Guard Mix, Courtney says she can't strip the guard down due to the possibility of Duncan freaking out. Then at the end of the episode, after Duncan returns to the competition, Courtney scolds Duncan for "abandoning" her, greatly annoying him. But then, she hugs him and tells him that she isn't really mad; she just missed him. Duncan's feelings appear to no longer be mutual, as he looks directly at Gwen (who was standing behind Courtney), saying "Every time I ran from the cops, I thought of you." Courtney naturally believed that Duncan said this to her, not seeing Duncan's attentions fixated elsewhere. Soon after, Duncan barges in on Gwen in the confessional and they start kissing; their actions setting the stage for a vicious love triangle scenario in the near future. Greek Mix, Courtney finds that Duncan indeed has a great singing voice and swoons over it, ironically being too far away to make out the lyrics, which pertain to the love triangle going on that she is unaware of still. After Duncan and Gwen's challenge is over, Courtney becomes deeply concerned about Duncan, constantly asking where he is and if he is okay, because she has not seen him since the beginning of his and Gwen's challenge. When Alejandro forces Tyler (the sole witness to Duncan and Gwen's kiss) to reveal to everyone what he's seen, Courtney is devastated, heartbroken, but at this point more enraged than anything else. She screams at Gwen for her betrayal, admitting that they were actually becoming "friend-ish." Back on the plane in first class, Courtney is seen being comforted by Heather as she breaks down and cries over her loss.
At the beginning of the episode, Courtney is shown making a list which includes getting back at Duncan and Gwen. In the confessional, she reveals that she still feels betrayed by Gwen, and that she apparently broke up with Duncan on "her terms," saying that it felt empowering. It is then revealed that she broke up with him by dumping a bowl of spaghetti on his head. She then breaks down crying in front of him and the other contestants, kicking and sobbing on the floor, while Duncan looks at her with a very guilty face. She then calls him and a "stupid jerk-face" and other words that weren't heard because of her crying. Duncan tries to apologize to her, but she interrupts him by kicking him hard in the groin. Courtney's confessional is then continued, in which she says in a cracked voice that she at least still had her pride, before finally breaking down and beginning to cry. Later, Courtney gets angry when Duncan openly flirts with Gwen, so Alejandro confronted her, saying she should flirt with someone else to make Duncan jealous. She decided to flirt with Tyler, which Duncan didn't seem to like too much. When Courtney later "flirted" with Tyler again, Duncan seemed surprised and possibly a bit upset, later revealing that he knew Courtney hated him, but he didn't think that she hated him that much. When she sees Duncan getting zapped by aliens just before crossing over into Area 51, Courtney laughs hysterically at his misfortune. Later, when Tyler was eliminated instead of Duncan, Courtney gets angry and whacks Tyler out of the plane. Courtney told Duncan that she'd get revenge on him and his new girlfriend, which he just smirked at.
Still obsessed with getting revenge on Gwen and Duncan, Courtney starts flirting with Alejandro, not knowing Duncan and Alejandro agreed to prank Courtney, letting her believe Duncan is getting jealous. As Duncan pretends to be hurt, not only Courtney believes it, also Gwen does. During the second part of the challenge, Alejandro and Duncan take the strategy to the next level, while Alejandro is surprised after learning Courtney indeed wants to lose the challenge. After Team Chris Is Really Really Really Really Hot wins, Courtney celebrates the results, while Duncan is late to realize their win meant the possibility of Gwen's elimination, as Courtney has planned. After the voting and the tie-breaker, Courtney manages to get rid of Gwen, and now she plans on getting back at Duncan too.
Courtney demands an apology from Duncan. He acts like he doesn't know what to apologize for, and refuses to apologize for kissing Gwen, which just makes Courtney angrier. Courtney tries to flirt with Alejandro to make Duncan jealous, but he apparently didn't care much.bear instead. After the bear attacked her, Duncan and Courtney were paired for the wedding challenge even though both did not want each other (Duncan actually tried going back into the machine). Courtney was even considering trying working with the bear. They fought constantly, stating each other's flaws. Although they were paired together, Duncan purposely gave Courtney wrong directions to taunt her. At the tight rope challenge, Duncan carried Courtney and they both passed customs. They both argued with each other, Courtney saying that Duncan was an insensitive jerk and mocking about his piercings while Duncan says she could use some mouthwash. When Chris says that they've won the challenge and that they have to share first class, they both angrily glare at him. Immediately after this, Courtney demands a divorce while Duncan sarcastically replies that he wanted to "stay married to your sunshiney self forever."
They are seen together in first class, but do not seem to enjoy each others' presence. Duncan admits he likes the silent treatment, but feels he needs to have Courtney in an alliance in order to overthrow Alejandro. He tries to talk to her and even calls her "ex-wifey" and "Court." Still holding a grudge against him, Courtney throws him into the cake. During the race challenge, Duncan stops and laughs at Courtney when her bike got stuck in a crack. When Alejandro asks Duncan about winning Courtney's loyalty, he replies that she hasn't got any of that, saying that he had already tried, relating to when Duncan tried to get Courtney to team up with him against Alejandro, but completely backfired. They continue arguing when Duncan mocks Alejandro for helping Courtney, saying that "Miss C.I.T." was now "Miss I Can't Do It Myself." Later in the race challenge, Courtney angrily says to Duncan that he was a loser because of his insults towards her. When Chris was on his phone, Duncan asked him if it was Courtney wanting him to say to her that she was a loser. Duncan also noticed that she was eating something during the food challenge. After it was revealed she was helping Alejandro cheat, Courtney was eliminated along with Blaineley in a double elimination. She tells Duncan that she is planning a defamation lawsuit against him. Duncan, however, doesn't seem to mind, as he sarcastically says goodbye to her instead, noticeably with a satisfied smile on his face. In a deleted clip, Courtney calls Duncan the Lover of the Goths and is happy now that she is away from him.
Alejandro comments that Duncan is as happy as ever, and he nods, saying that "it's as if all of his problems were pushed off a plane," obviously referring to Courtney. Duncan also noted that his romance with her is a failure.
Courtney displays dislike towards Duncan when he stood next to her, calling him "Jerk-face." Throughout the episode, Courtney wanted to sing a song she wrote that is basically a hate-song expressing her dislike for Duncan and Gwen. She tried to sing it on several occasions, but was interrupted by something else. Her first attempt was during Who You Gonna Root For?, and she sang that Gwen was a boyfriend stealer and that Duncan was a dead man, but Geoff stopped her. She started to sing her song again, with the first line mentioning that Duncan never used soap, just before the song I'm Winning This began. Also, in a deleted scene from the episode, Courtney tries to sing the song for a third time, while she is standing next to Gwen and Duncan (who are relaxing on the beach in lounge chairs, alongside other couples). When Courtney starts singing again, Duncan finally gets so fed up that he throws a sandal at her face, knocking her down.
Duncan is annoyed by Gwen sighing over being labelled a villain, saying he "might as well be dating Courtney". Later, Courtney glares a few times at Gwen, still clearly upset over the events of Total Drama World Tour. When Gwen complains to Duncan about Courtney's glaring, Duncan offers to glare back at Courtney on behalf of Gwen, which he does. However, Courtney ignores him. Duncan tries to get Courtney's attention, but she continues to ignore him. In a confessional, Duncan shows that he feels hurt that Courtney is completely ignoring him now, but he fake shrugs this off.
Following Duncan's confessional, Lindsay tells Courtney that Duncan may want to be yelled at for old times' sake. However, Courtney states that it'd be pointless, since Duncan "never listens". Furthermore, Courtney seems to have fully accepted that things are finally over between her and Duncan, stating that things probably wouldn't have lasted anyway due to him being a "bad boy".
Duncan believes that Courtney is pretending to be interested to Scott in order to make him jealous which he pretended to not be bothered. Throughout the episode, Duncan constantly asked Gwen whether or not Courtney is talking about him. This, along with several events in the previous episodes, is the breaking point for Gwen and she ends her relationship with him.
Gwen and Courtney routinely mock Duncan through the boxing challenge, both taking amusement in seeing him unable to fight the bird he had been unable to bring harm to in the previous episode as the two of them rebuild their friendship. However, when Chris pits the two girls against each other in a fight they both refuse, prompting Chris to pull out a montage of clips from Sierra's blog of all the time Gwen and Duncan kissed in World Tour. This clip show infuriates Courtney once more, and she hammers Gwen with blows as she vents her anger over her kissing her former boyfriend. Duncan sees this and is pleased to see the girls fighting over him, bragging to Alejandro as he watches. He is also ecstatic, and thinks that Courtney still has feelings for him. However, when the girls exhaust themselves in their fight, Gwen admits she only wanted to make things better with Courtney, and Courtney responds that she had gotten over Duncan and never truly missed him after season three but had actually missed Gwen, much to Duncan's shock and dismay.
Duncan wanted to be in an alliance with Courtney and Gwen. Duncan says he could protect them from Mal but since they refuse to believe that "Mike" is one of the biggest threats in the competition they laugh at Duncan and refuse his alliance offer.
- This couple, along with Duncan and Gwen, is one of the only two couples in which both members compete in four seasons.
- They are the only members of the Killer Bass to reach the final four at any point in the series.
- This couple has broken up more times than any other couple.
- They are the only former members of the Killer Bass to compete in Total Drama All-Stars.
- Both have chosen the million dollars over each other in the relationship:
- Courtney did so in Total Drama, Drama, Drama, Drama Island, where she ran off with the suitcase full of money instead of aiding an injured Duncan, explaining that "opportunities like this don't just fall out of trees."
- Duncan did so in Top Dog. After receiving a thirty-two page document of his faults and how to correct them, Duncan was annoyed enough with her to vote her off, citing that, even though he really did like her, he "needs the money more than he needs some high-maintenance chick with a superiority complex."
- In Total Drama Action, Total Drama World Tour, and Total Drama All-Stars both were the last two former Killer Bass members left in the game.
- Granted, they are the only former Killer Bass members to compete in the latter season, and are therefore the only two Killer Bass members to compete in four seasons.
- Both have been in a band; Courtney was in "The A-Type Psychotic Crazies" and Duncan was in "Der Schnitzel Kickers."
- This relationship was part of a love triangle with Duncan and Gwen.
- Both, along with Owen, are the only contestants to reach the merge three or more times.
- However, all three of them have to either have to return to the competition after have been eliminated previously or make their debut midseason after initially not qualified.
- Both Courtney and Duncan returned in the thirteenth episode of a season, with the one who returned either directly or indirectly helping the team with the other on it to win the challenge and, subsequently, going to the other team as a "consolation prize," per Chris' decision.
- When both returned, the other one of them was the first to encounter them.
- Both are involved with at least one of each others eliminations:
- In Basic Straining, Harold rigged the votes, causing Courtney's elimination as a revenge for Duncan's bullying towards him. In Top Dog, Duncan votes Courtney off after she gave him a thirty-two page letter of all his mistakes. In Chinese Fake-Out, Duncan once again votes for Courtney.
- In Walk Like An Egyptian - Part 1, Duncan is furious over Courtney and Gwen's quarreling, along with several other reasons, causing him to quit.
- According to an interview, Tom McGillis (the creator of Total Drama) prefers this relationship over Duncan's new relationship with Gwen.
- According to an interview with Christian Potenza, their breakup (along with Trent and Gwen's) was an executive decision.
- They are two of only three characters to be on five teams, with the third being Izzy.
- They have both placed fourth and fifth in two different seasons.
|Interactions with||Everyone | Alejandro | Beth | Bridgette | Chris | Duncan | Gwen | Harold | Heather | Lindsay | Scott|
|Other content||Courtney's alliances | Courtney's lawyers | Courtney's Personal Digital Assistant|
|Interactions with||Everyone | Alejandro | Beth | Bridgette | Chef Hatchet | Chris | Cody | Courtney | DJ | Geoff | Gwen | Harold | Heather | Leshawna | Mike | Owen | Trent | Zoey|
|Other content||Guys' alliances | Petey | Scruffy|