This episode is noted as a "bottle episode," featuring only the primary voice cast and using existing character models . Voice Actor Ben Tennyson, Albedo Ashley Johnson Gwen Tennyson Greg Cipes Kevin Levin Dee Bradley Baker Various Aliens (Swampfire, Four Arms, Big Chill, NRG, etc.) Production Details Network : Cartoon Network . Director : Dan Riba . Writer : Don McGregor (credited alongside Man of Action) .
As the episode progresses, Ben finds himself in a surreal nightmare world where: This episode is noted as a "bottle episode,"
The Ben 10: Ultimate Alien episode (Season 3, Episode 17) is a psychological thriller that serves as a pivotal character study for the series' recurring antagonist, Albedo . Premiering on March 10, 2012, it is the final episode before the three-part series finale . Plot Summary Writer : Don McGregor (credited alongside Man of Action)
: He is relentlessly attacked by past enemies like the DNAliens, Vilgax, Aggregor, and Ultimate Kevin—none of whom speak . Plot Summary : He is relentlessly attacked by
: His parents and neighbors have vanished, and his friends Gwen and Kevin act out of character, demanding he hand over the Ultimatrix .
The episode ends with Albedo trapped in a permanent nightmare of his own making, while Ben and his team wait for Plumber assistance to safely remove the creature .