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 6 · Episode 52 ·
Johnny's Last Chapter
Johnny and Dukey are sucked into a history book.
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Episode 52 of season 6 of Johnny Test: “Johnny's Last Chapter”. Aired 2014-06-18. Watch it online free on ZapFlix.