Duncan and Mike

This article focuses on the interactions between Duncan and Mike.

Overview
Due to being placed on different teams, Duncan and Mike did not interact much in the beginning of Total Drama All-Stars. However, Duncan's heroic action in Saving Private Leechball gives Chris the opportunity to replace Courtney with him on the Heroic Hamsters. Although Duncan is often shown wanting to be a villain again, he behaves civilly towards his new teammates, including Mike. Duncan notices the familiarity in Mike's voice over time. However, he cannot remember their history until he hears Mike's evil alternate personality whistling. Duncan reveals to the audience in No One Eggspects The Spanish Opposition that he knows Mike from juvenile prison, known then as a highly dangerous inmate named Mal. Realizing he and the other contestants are in serious trouble, Duncan tries to warn them of the truth - starting with Mike's girlfriend, Zoey.

Saving Private Leechball
During the challenge, Duncan tells Gwen to imagine that Mike is Courtney, so she can "clobber" him.

Food Fright
At the beginning of the episode, Mike seems genuinely happy to have Duncan on his team, celebrating his arrival along with Sam, Sierra, and Zoey. Duncan is annoyed by the gesture, thinking they are putting him on a pedestal in order to vote him off later, but accepts the cake. He later encourages Sam, but, remembering his bad boy nature and former villain status, quickly corrects himself. Mike reassures him that "it's okay to be a team player." Duncan simply looks at him strangely and notes that his voice sounds familiar.

Moon Madness
In the woods, Duncan comes across Mal speaking to a blue harvest moon-affected bird and demands to know where he knows him from. Pretending to be Mike at the time, Mal tries to cover up by stating his past Total Drama experience. Duncan, however, doesn't buy it. Before he has a chance to figure out his identity, Mal sets the bird free. It scares Duncan so severely he runs off, as Mal laughs at his expense.

No One Eggspects The Spanish Opposition
In the confessional, Duncan becomes distressed over his team's "heroic kindness" and thinks it may be rubbing off on him. He tries to prove he's still a "bad boy" by stabbing his knife into the wall, only to have the blade break. Mal then appears sarcastically wondering what happened to it. A flashback reveals that he stole Duncan's knife the previous night and crushed it with a rock. Due to Mike partnering up with Zoey for the challenge and Duncan wanting to be a "lone wolf," the two are distant until the elimination ceremony. When Mike/Mal volunteers for exile, he can be heard whistling In the Hall of the Mountain King on his way to Boney Island, during which their past finally hits Duncan. He reveals in the confessional that he and Mike were in juvie simultaneously, and the latter was called "Mal" at the time. Duncan then elaborates that he was "running the place" and is "bad news."

Suckers Punched
While Mike is still on exile, Duncan approaches Zoey and explains how he knew her boyfriend previously, as well as informing her about his evil personality. The lack of familiarity on Mal's end is explained by the fact that Duncan steered clear of him. During the challenge, Duncan and Zoey witness how Mal ruthlessly clobbers Izzy. They are further convinced that Mike is Mal when Izzy mentions Mal's name. That night, Duncan and Zoey consider the possibility that Mike is actually an alternate personality, while Mal is the real one. Duncan later states Mal was saved only because his own team could not vote.

You Regatta Be Kidding Me
Duncan attempts to warn Courtney and Gwen about Mike and how he is very dangerous. However, the newly reunited friends refuse to believe him, as they think Mike is one of the nicest people around.

Trivia

 * This is the third known pair to have known each other in some way prior to the show, the other two being Katie and Sadie, Izzy and Justin and Amy and Samey.
 * Both of them were involved in a love triangle in the show. Additionally, both involved two females conflicting over them.
 * Both of them have been the first contestant to be eliminated after the merge in a season.
 * Mike was eliminated in Grand Chef Auto in Total Drama: Revenge of the Island.
 * Duncan was eliminated in You Regatta Be Kidding Me in Total Drama All-Stars.
 * Said eliminations were also both irregular. Mike was voted out on Scott's decision only and Duncan was automatically eliminated due to blowing up Chris's cottage.
 * Both reached the finale in the second season they participated in.
 * Both of them, along with Chris, Beth, Lindsay and Izzy, have a known prison record.