

Twenty contestants take on one of television's largest and most extreme obstacle courses.

Twenty contestants take on one of television's largest and most extreme obstacle courses.

Twenty contestants take on one of television's largest and most extreme obstacle courses.

Twenty contestants take on one of television's largest and most extreme obstacle courses.

Twenty contestants take on one of television's largest and most extreme obstacle courses.

Twenty contestants take on one of television's largest and most extreme obstacle courses.

Twenty contestants take on one of television's largest and most extreme obstacle courses.

Twenty contestants take on one of television's largest and most extreme obstacle courses.

The eight previous champions return to go head-to-head to become Champion of Champions.

Ten celebs take on one of television's largest and most extreme obstacle courses.