The latest instalment of the action-packed, extremely popular animated series continues to follow the adventures of Ben Tennyson, bearer of the Omnitrix, a watch-like device that allows Ben to change into different aliens, each with their own unique powers and abilities. Storylines alternate between that of eleven-year-old Ben (a year after the original series took place) and sixteen-year-old Ben (a few months after Ben 10: Ultimate Alien).

After Gwen leaves for college and Kevin leaves to be close to her, sixteen-year-old Ben gets a new partner, a rookie by-the-book alien newly graduated from the Plumber Academy named Rook. On a mission to explore a secret underground alien city named Undertown, Ben explores the stranger side of things in the alien underground and discovers that enemies from his past are looking for a rematch. At the same time, Ben is being targeted by a mysterious hunter known as Khyber.

Episodes Comprise:

• The More Things Change:
  • Part 1
  • Part 2
• A Jolt from the Past
• Trouble Helix
• Have I Got a Deal for you