Knock Knock, Who’s There? Wipeout Wipeout : Season 3 Episode 11

Wipeout is an American reality show series in which contestants compete in what is billed as the "world's largest obstacle course". Wipeout is hosted and commentated by John Henson and John Anderson, while Vanessa Lachey acts as the "on-location" presenter. The former presenter was Jill Wagner.