The Obsta-Kill Kourse

'''The cast must go through an extreme obstacle course with danger around every corner. Someone becomes obsessed in stopping a great evil after seeing what they're capable of, but has a hard time convincing the rest of the cast; while another tries to clear their name regarding an embarrassment that hurt their relationship. Although a hero helps another to defeat their greatest rival, it isn't enough to prevent a scheme involving the flushing of a powerful manipulator.'''

General

 * This is the first episode in the season where a female is exiled to Boney Island, and the first time one of the original twenty-two campers from Total Drama Island is exiled.
 * As of this episode, both contestants who debuted in Total Drama World Tour who competed in Total Drama All-Stars have been eliminated.
 * With this, every contestant in Total Drama history has been eliminated at least once, counting Alejandro's ending in Total Drama World Tour.
 * With Alejandro's elimination, Gwen is the only contestant remaining who has been a finalist of a season.
 * Also with Alejandro's elimination, all of the males from the first generation cast have been eliminated.
 * Courtney admits that she has kissed Alejandro in the past, this was unknown due to it never being shown on the show nor mentioned until this episode.

Continuity

 * This the first episode since Food Fright where a contestant is eliminated by being voted off.
 * Scott and Courtney get back together in this episode after having broken up in the previous episode.
 * This episode marks the first time Alejandro has been voted off as he was in the final two of Total Drama World Tour.
 * This episode marks the first time that Zoey wins individual immunity.
 * This is the first episode since Evil Dread where "Mike" accesses one of his personalities, which Mal transforms into Svetlana.