Classic Ben 10, Dr. Animo and the Mutant Ray

Max's ex-partner as a plumber Phil resurfaces with nefarious intentions. He steals the dangerous Null Void Projector which puts our heroes in jeopardy until Grey Matter is able to turn the projector on Phil and put him permanently inside it.

During a trip to Yellowstone Park Ben discovers an insectillian called 'The Great One' that intends to devour the entire planet.

Ben discovers that look-alikes of his Omnitrix have been committing crimes around San Francisco and that SACT is hot on the trail.

Ben discovers that he has travelled back in time to the same day that he first found the Omnitrix...

Ben and Kevin 11 are beamed up to a space ship where they're shackled to one another. There they must learn to fight together in order to bring down a vicious promoter who pits aliens against aliens in gladiator battles.

When an intergalactic trio of alien super heroes arrives in Pittsburgh to track down the bounty hunter Six Six and his alien henchman Ben joins the trio.

After Max just misses running over a fleeing summer camper on the road Ben Max and Gwen take the boy back to his nearly deserted camp.

When Max finds out that part of an alien weapon has been unearthed in Texas he becomes obsessed with finding it.

Max’s old friend has just built the world’s only underwater resort and Ben Gwen and Max are invited for a sneak peak.

Gwen’s “Lucky Girl” powers return when she buys a magical stone at a magic convention in Las Vegas.

Dr.Animo has broken out of jail and has been tracking down Ben intent on revenge. At the same time Ben’s broken off a piece of the Omnitrix and as a result has turned into weird alien combinations i.e. StinkArms.

Ben’s internal demons get externalized when Ghostfreak escapes from his watch and becomes a full fledged being on his own.

Ben’s feeling cocky with the watch. He’s “unlocked” its secret and now can become any alien he wants whenever he wants.