• Air date: 01 Aug '12 80 episodes
      Ben was all set to be a solo hero with his new Omnitrix after Gwen and Kevin left for college, but Grandpa Max teamed him up with a rookie, by-the-book partner. Together they explore a secret alien city, known as Undertown beneath the city of Bellwood. Meanwhile, a mysterious hunter, known as Khyber, sets his sights on Ben! With all new alien heroes to choose from, the fun is just getting started. It's a whole new Omniverse!
  • List of Episodes (80)
    • 26. The Frogs of War (1)

      16 Mar '13
      Incursians take control of Earth, so Rook and the Plumbers must stop them, while Ben is somehow missing.
    • 27. The Frogs of War (2)

      16 Mar '13
      Ben, Rook, Gwen and Kevin must find a solution to stop the Incursians once and for all.
    • 28. Rules of Engagement

      23 Mar '13
      Looma attacks Ester's village, forcing Ben, Rook, and Julie after capturing Fistina to stop her.
    • 29. Rad

      30 Mar '13
      With Plumber agents trapped in Incursean territory, Ben and Rook must employ the services of Rad Dudesman, the roughest, toughest smuggler in the galaxy.
    • 30. Evil's Encore

      06 Apr '13
      Dr. Animo remembers the time he had taken control of the Plumber Headquarters inside Mount Rushmore with bugs that easily hack computer codes, planning to mutate everyone on Earth into grotesque, monstrous creatures resembling him.
    • 31. T.G.I.S.

      05 Oct '13
      The Secret Saturdays are looking for a chupacabra when they run into Ben and Rook who end up helping them.
    • 32. Food Around the Corner

      12 Oct '13
      Ben, as Gravattack, tries to moderate a peace treaty in spite of an alien flea infestation.
    • 33. O Mother, Where Art Thou?

      19 Oct '13
      Ma Vreedle threatens to blow up the sun if Ben and the Plumbers don't find her missing son.
    • 34. Return to Forever

      26 Oct '13
      The Forever Knights threaten to erase all alien DNA on earth.
    • 35. Mud is Thicker Than Water

      02 Nov '13
      Ben, Gwen and Cousin Lucy try to find out how Psyphon's thugs are getting Plumber technology.
    • 36. OTTO Motives

      09 Nov '13
      Kevin and Rook run into an old enemy from the Null Void while attending an intergalactic auto show.
    • 37. The Ultimate Heist

      16 Nov '13
      Albedo seeks a device that will finally change him back into his Galvan form. Ben is locked in Plumber HQ prison.
    • 38. A Fistful of Brains

      23 Nov '13
      Grandpa Max and Rook are looking all over the galaxy for Ben who is trapped on Khyber's hidden personal hunting preserve.
    • 39. For a Few Brains More

      30 Nov '13
      Grandpa Max and Rook are looking all over the galaxy for Ben who is trapped on Khyber's hidden personal hunting preserve.
    • 40. Max's Monster

      07 Dec '13
      Ben, Rook, and Max have their hands full when Phil returns, now half Terroracula, and starts absorbing all the electricity in Bellwood.
    • 41. Something Zombozo, This Way Comes

      15 Feb '14
      Ben and Rook have had little to do for the past two weeks when they decide to investigate a circus.
    • 42. Mystery Incorporeal

      22 Feb '14
      An old enemy emerges while Ben and Rook visit Kevin and Gwen at college.
    • 43. Bengeance is Mine

      01 Mar '14
      Vilgax's former lackey Psyphon is elated when his master returns.
    • 44. An American Benwolf in London

      08 Mar '14
      Ben and Rook are called to London, England, to investigate the Forever Knights' latest activities.
    • 45. Animo Crackers

      15 Mar '14
      Dr. Animo from the future comes back to the present to help himself defeat Ben once and for all.
    • 46. Rad Monster Party

      22 Mar '14
      Ben and Rook enlist the help of intergalactic smuggler Rad Dudesman to fly them through the Anur System—home of the monstrous aliens!
    • 47. Charmed, I'm Sure

      29 Mar '14
      Still stranded on the monster planet Anur Transyl, Ben and Rook reluctantly team up with Charmcaster to take on Zs'Skayr.
    • 48. The Vampire Strikes Back

      05 Apr '14
      Ben, Rook, and Rad Dudesman come face to face with the evil Lord Transyl, a vampire-like alien who can make anyone his loyal slave!
    • 49. Catfight

      12 Apr '14
      The princesses Looma and Attea are at odds over who gets to marry Ben!
    • 50. Collect This

      19 Apr '14
      Ben finally meets the ones responsible for his intergalactic TV show, and the actor who makes Ben 10 more famous than Ben himself!