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.
Created by Scott Fellows
Starring James Arnold Taylor, Maryke Hendrikse, Ashleigh Ball, Lee Tockar, Ian James Corlett
Where to Watch Johnny Test
Johnny Test is currently streaming on Netflix and Hoopla in the United States. Availability last checked October 20, 2026.
Cast & Creators
Seasons
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6 seasons + Specials · 234 episodes
Season 1
2005 · 26 episodes
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Season 2
2006 · 26 episodes
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Season 3
2007 · 26 episodes
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Season 4
2009 · 52 episodes
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Season 5
2011 · 52 episodes
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Season 6
2013 · 52 episodes
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Specials
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More About Johnny Test
09/17/2005
English
Ended
The WB, Cartoon Network, The CW
6
234
S6 E52 · Johnny's Last Chapter · June 18, 2014
Metadata and media information from TMDB.
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