Tara Strong as Ben Tennyson / Upgrade / Sandra Tennyson / Computer (voice)

Meagan Moore as Gwen Tennyson / Girl Student (voice)

Paul Eiding as Grandpa Max (voice)

Dee Bradley Baker as Stinkfly / Vulpimancers / Carl Tennyson / Cash Murray (voice)

Steve Blum as Heatblast / Mechamorph

Jim Ward as Diamondhead

Richard McGonagle as Four Arms / Ben’s Teacher (voice)

Fred Tatasciore as Way Big / Evil Way Big (voice)

Richard Steven Horvitz as Grey Matter / Dispatcher (voice)

Dave Fennoy as Tetrax (voice)

Dwight Schultz as Dr. Animo (voice)

Adam Wylie as JT (voice)

Robert David Hall as Azmuth (voice)

Troy Baker as Retaliator / Boy Student (voice)