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.
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Seasons
- Stagione 126 episodes · 2005
- Stagione 226 episodes · 2006
- Stagione 326 episodes · 2007
- Stagione 452 episodes · 2009
- Stagione 552 episodes · 2011
- Stagione 652 episodes · 2013
