When Ben meets a young Generator Rex on the run from a hostile Providence, he must work through a series of misunderstandings, and defeat the dark wizard Hex in order to save the world.
| Actor | Role |
|---|---|
 Tara StrongBen Tennyson (voice) | Ben Tennyson (voice) |
 Montse HernandezGwen Tennyson (voice) | Gwen Tennyson (voice) |
 David KayeMax Tennyson / Shock Rock (voice) | Max Tennyson / Shock Rock (voice) |
 Travis WillinghamCannonbolt (voice) | Cannonbolt (voice) |
 Daryl SabaraRex Salazar / Heatblast (voice) | Rex Salazar / Heatblast (voice) |
 John DiMaggioBobo / Four Arms / Phil (voice) | Bobo / Four Arms / Phil (voice) |
 Robin Atkin DownesHex (voice) | Hex (voice) |
 Josh KeatonXLR8 (voice) | XLR8 (voice) |
 Roger Craig SmithDiamondhead (voice) | Diamondhead (voice) |
 Vic ChaoAgent Six (voice) | Agent Six (voice) |
 Todd HaberkornSlapback (voice) | Slapback (voice) |
 Dee Bradley BakerRath / Jetray (voice) | Rath / Jetray (voice) |