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 17 ·
The Quantum of Johnny
Johnny tries to get invited to a party to stop a villain. NOTE: Susan and Mary don't appear in this episode.
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Episode 17 of season 4 of Johnny Test: “The Quantum of Johnny”. Aired 2009-12-10. Watch it online free on ZapFlix.