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 5 · Episode 9 ·
Johnny Swellville
A time-traveling mishap sends Johnny and Dukey back to the 1950s.
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Episode 9 of season 5 of Johnny Test: “Johnny Swellville”. Aired 2011-07-18. Watch it online free on ZapFlix.