Food Fight: Valley Girls vs. Jersey Boys

S04 E01 • Wednesday, Jun 1, 2011 • Jun 1

Sports Mashup: The Speed Demons vs. Chillaxers

S04 E02 • Wednesday, Jun 8, 2011 • Jun 8

Weird Science-Attack of Geniuses: The Straight A's vs. The A Gamers

S04 E03 • Wednesday, Jun 15, 2011 • Jun 15

Battleship Boom: Bullseyes vs. Frenemies

S04 E04 • Wednesday, Jun 22, 2011 • Jun 22

Submarine Showdown: Army Brats vs. Navy Brats

S04 E05 • Wednesday, Jun 29, 2011 • Jun 29

Blimps?: Mad-Moves vs. Mad Scientists

S04 E06 • Wednesday, Jul 20, 2011 • Jul 20 • 30m

A blimp challenge pits athletes against scientists.

Celebrities: Skaters vs. BMXers

S04 E07 • Wednesday, Jul 27, 2011 • Jul 27

Ultimate Warrior: Team Captains vs. Class Presidents

S04 E08 • Wednesday, Aug 3, 2011 • Aug 3

Andrew's TV Funhouse: Dee Jays vs. Dirt Bikers

S04 E09 • Wednesday, Aug 10, 2011 • Aug 10

Urban Cowboy: The Engineers vs. The Hams

S04 E10 • Wednesday, Aug 17, 2011 • Aug 17

Destroyers in Space: Black Belts vs. The Cleats

S04 E11 • Wednesday, Aug 24, 2011 • Aug 24

Destroy Sweet Destroy: Tricksters vs. Trash Talkers

S04 E12 • Wednesday, Aug 31, 2011 • Aug 31

Team Wentz vs. Team Chiddy

S04 E13 • Wednesday, Sep 7, 2011 • Sep 7

The Art of Destruction: The Glee Club vs. 4.0's

S04 E14 • Wednesday, Sep 14, 2011 • Sep 14

Catch and Destroy: The Models vs. Grease Monkeys

S04 E15 • Wednesday, Sep 21, 2011 • Sep 21