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 3 · Episode 4 ·
Johnny vs. Dukey
After Johnny and Dukey send Bumper packing, they start to come against each other in a game of "Say Uncle".
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Episode 4 of season 3 of Johnny Test: “Johnny vs. Dukey”. Aired 2007-09-03. Watch it online free on ZapFlix.