Johnny Test
Young Johnny is gung-ho and full of courage. Johnny's brainiac twin sisters, Susan and Mary, use Johnny as their guinea pig for their outrageous scientific experiments. If they can dream it up, Johnny will do it; as long as his genetically engineered super dog, Dukey, can come along.
Season 4 · Episode 31 ·
Johnny's Amazing Race
Johnny and Dukey challenge his sisters, their friends, and their enemies to a survival challenge in which the winning team gets hundreds of dollars in gift certificates.
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Episode 31 of season 4 of Johnny Test: “Johnny's Amazing Race”. Aired 2010-07-12. Watch it online free on ZapFlix.