Wipeout Season 4 Episode 21 - All Stars, air date July 14,2011 8:00 PM on ABC. 24 contestants compete against the clock. The final 4 then face the Wipeout Zone. The winner gets $50,000.

Twenty-four contestants compete against each other and the clock to make it through wild obstacle courses to ultimately be one of the final 4. The final 4 then face the Wipeout Zone. The contestant with the fastest time wins $50,000.

Wipeout is inspired by a Japanese game show and will be taking extreme obstacle courses (such as those from Spike TV's "MXC" and G4's import "Ninja Warrior") to a new level. Contestants will be competing for $50,000 and ESPN's John Anderson will be hosting.

This competitive reality show pits 24 contestants against each other to see who can most effectively grapple with the wild and impossible challenges of an obstacle course, with the winner taking home a $50,000 prize. With more slips, falls, and slapstick slips, the show provides not just excitement, but over the top comedy at every turn.