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Ben 10: Ultimate Alien S1E20
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Ben 10: Ultimate Alien

Ben 10: Ultimate Alien

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With his secret identity now revealed to the world, Ben Tennyson continues to fight evil as a superhero with the help of the newly acquired Ultimatrix.

Date: 04/23/2010
Rating: 8.2
Cast: Yuri Lowenthal, Ashley Johnson, Greg Cipes, Dee Bradley Baker

Yuri Lowenthal as Ben Tennyson (voice) in Ben 10: Ultimate Alien Yuri Lowenthal

Ashley Johnson as Gwen Tennyson (voice) in Ben 10: Ultimate Alien Ashley Johnson

Greg Cipes as Kevin Levin (voice) in Ben 10: Ultimate Alien Greg Cipes

Dee Bradley Baker as Humungosaur (voice) in Ben 10: Ultimate Alien Dee Bradley Baker