Albedo Ben has stolen the Ultimatrix (an upgrade to the Omnitrix) from Azmuth and has used it to kidnap Gwen and Kevin.
An ill Ben is pleased to see an old friend in Tetrax but is caught off guard when Tetrax demands that Ben give him Chromastone.
The Alien Force faces its greatest challenge ... without the Omnitrix.
Vilgax and Albedo team up against the Alien Force. Ben faces off against Albedo, who's armed with the Ultimatrix.
Ragnorok, the villain who killed Kevin's father, is out to complete the mission he started years ago. Kevin, however, is determined to get revenge.
The Plumber's Helpers receive a distress call from Max, then a threatening message from Ben to not interfere. The Helpers face off against Ben.
Tetrax arrives and demands Chromastone. He has learned Chromastone's true purpose, but as he reveals the secret to the team, Vilgax arrives.
Gwen travels back in time to prevent Kevin and Ben from hacking the Omnitrix. Her actions have unexpected consequences.
Vilgax has learned a valuable secret about the Omnitrix. He's determined to use that knowledge to his advantage.
An alien race asks the team to deliver the Tiffin to another race as a peace offering. The Omnitrix changes Ben into a highly aggressive new form.
The team investigates some alien technology, including a box that is more advanced than the Omnitrix. Naturally, others desire this technology.
Kevin tracks down Darkstar. Darkstar asks for Kevin's help to retrieve an item that could cure them both.
Ghostfreak is loose and takes over Vilgax's planet. For help, Vilgax turns to the only person who has defeated Ghostfreak: Ben.
Charmcaster wants payback from Gwen. She plots to steal Kevin away from Gwen.
Unaware of the war's resolution, an awakened Highbreed begins his failsafe mission to destroy Earth.
Watch more Ben 10 on Cartoon Network!
Download the TV Guide app for iPhone, iPad and Android!