The killer

The escaped psycho killer with the chainsaw and a hook is a character who appeared and attempted to murder Gwen, however, she managed to stop him before he could succeed.

Total Drama Island
During the horror movie challenge, the killer happens upon Gwen in the mess hall. Thinking he's an actor and it's part of the challenge, Gwen taunts him and then offers him food. Before getting the chance to murder her, the rest of the cast runs into the mess hall to warn Gwen that she's in danger. She panics, and kicks the killer in the face repeatedly, causing him to leave, believing he is bleeding.

Total Drama Action
At some point after, the killer was found by Chris and hired to pretend to be on his upcoming show, "Total Drama Dirtbags", which was later revealed to be a fake show.

Between Total Drama Action and Total Drama All-Stars
At some point after being hired by Chris, the killer is finally caught and arrested.

Total Drama All-Stars
When Chef is walking through the prison to get Chris freed, the killer is trying to convince them of his innocence by repeating it to the guard accompanying Chef.

Notes and trivia

 * The killer is one of the few characters to have more than one voice actor, with the others being Courtney and Alejandro.

Season 1 (1/28)

 * Hook, Line and Screamer d

Season 2 (1/27)

 * Celebrity Manhunt's Total Drama Action Reunion Show c n

Season 5 (1/26)

 * Heroes vs. Villains c