Khyber attacks Ben and Rook at a festival.
Blukic and Driba arrive at Mr Smoothy to try the new flavor, while Rook and Ben fight Trumbipulor.
Magister Patelliday is kidnapped by pirates who rob ships and put them in giant glass bottles to sell them. They intend to devour Patelliday. Any attempts at rescue are hard, since they have a Krakken and a robot army.moreless
Returning from college, Kevin and Gwen fill Ben in on Kevin's new job and hiding from Princess Looma.
Rook and several Plumbers are accidentally transformed into other aliens when a part of Ben's Ominitrix is stolen during a prison break.
Ben is not deterred and continues to fight to the best of his ability.
Khyber and his Omintrix possessed pet have been testing Ben's skills and gathering information. They now use their collected knowledge to finally face Ben in battle.
In the midst of a killer heatwave, an extremely flexible thief makes off with a very hot item. Things heat up even more, when Rook begins to suspect she may have designs on Ben as well.moreless
Ben and Rook discover that Argit and the Vreedle brothers have stowed on board an alien space vessel.
Ben's old enemy Dr. Animo returns to confront Rook.
Ben struggles to control a giant alien when a group of activists prevent him from harming the alien.
Khyber the Huntsman infiltrates a facility to download information on Ben Tennyson's experience with a deformed Mechamorph named Malware. He learns of Malware's creation and destruction, as well as Malware's search for a Helix.moreless
Ben encounters an old enemy from his youth, the Megawhatts. But this time, they need his help in freeing them from their capture.
After parting ways with Gwen and Kevin, Ben is assigned a new alien partner named Rook Blanko. Meanwhile, Khyber the Hunstman targets Ben as his next prey.
With his new partner by his side, Ben investigates Undertown in search of clues. Once there, he learns that Vilgax's old lackey Psyphon is causing trouble.