Killer

The Killer is a psycho criminal who is normally seen with a chainsaw and a hook and escaped from prison off-screen. He first appeared in Hook, Line, and Screamer. He makes a brief cameo appearance in Total Drama Action as a contestant for a fake season as well as in Total Drama All-Stars.

Total Drama Island
In Hook, Line, and Screamer, Chris sets up a challenge in which the campers have to survive a "real-life horror movie" by "surviving" a night with an escaped psycho killer on the loose, who is actually Chef Hatchet in disguise. Owen picks up a newspaper article dropped by Chris and Chef as they make their escape from the island in the Boat of Losers. The article describes the psycho killer and his escape from prison. However, as the challenge reaches its conclusion, a real psycho killer (presumably the one from the article) comes to camp and attempts to attack Gwen in the main lodge. At first, Gwen does not believe that he is the real psycho killer, assuming that he is just a poorly-paid actor. The campers, Chris, and Chef all watch this live on Chris' screen in the control tent, then immediately rush to the main lodge to save Gwen from him. When everyone reaches Gwen and warns her, she quickly reacts and kicks the killer in the jaw several times to defeat him and inadvertently win the challenge. Angered by this, he complains in a high-pitched voice and storms out of the mess hall. At the end of the episode, he is shown behind a bush, menacingly whispering the name of the season over and over again. Afterwards, he asks the camera crew if Gwen's repeated kicks had caused his nose to bleed.

Total Drama Action
The killer makes a brief cameo appearance in Celebrity Manhunt's Total Drama Action Reunion Special. He appears walking down the red carpet at the Gemmie Awards as one of the contestants in Chris' new reality show, Total Drama Dirtbags. This show is later proven to be a fake season created by Chris.

Total Drama All-Stars
The killer makes a brief appearance in the first episode of the season, in the same prison that Chris is incarcerated in. He is seen protesting his innocence to the guard guiding Chef Hatchet to Chris' cell.

Trivia

 * The killer parodies several famous slasher movie killers:
 * Michael Myers from Halloween, with the idea of a psychotic killer escaping from prison.
 * Jason Voorhees from Friday the 13th, with his mask and the basic idea of him attacking a group of kids at a summer camp. He is also very large, and his face is very distorted, like Jason. He also uses a distant, repetitive chant like Jason, in which he repeats words over and over again such as "Duncan, Duncan, Duncan."
 * Leatherface from The Texas Chainsaw Massacre, with his dirty apron and chainsaw.
 * Ben Willis from I Know What You Did Last Summer, with his hook.
 * Total Drama World Tour and Total Drama: Revenge of the Island are currently the only seasons to not feature the Psycho Killer.