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) .
: It is widely considered one of the "darkest" episodes of the franchise due to its psychological horror elements and the tragic nature of Albedo's defeat . Ben & Albedo's Nightmare World ft. O.R.Ash 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)
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 . As the episode progresses
As the episode progresses, Ben finds himself in a surreal nightmare world where: