| Ep # | Title | Summary | |------|-------|---------| | 71 | The Final Battle: Part 2 | Ben as Atomix + Feedback defeats Eon. Vilgax is imprisoned forever. | | 72 | A New Dawn | Ben must stop the Annihilarrgh from erasing all existence; uses Alien X to recreate the universe. | | 73 | Hole in the World | A black hole appears in Undertown – caused by a grieving Celestialsapien child. | | 74 | The Search for Bivalvan | Ben tracks down the Andromeda 5 aliens one last time. | | 75 | The Big Story | A journalist tries to expose Ben’s “reckless” past. | | 76 | The Sound and the Furry | Zed (Khyber’s dog) gives birth to shape-shifting puppies. | | 77 | The Last Laugh | A jester alien uses laughter as a weapon. | | 78 | The Tennyson Summit | All Tennyson cousins (Gwen, Sunny, Ken, Lucy) unite to stop a family curse. | | 79 | The Once and Future Ben | An elderly Ben from a doomed timeline begs current Ben to change history. | | 80 | End of the Road | Ben retires from active Plumber duty. Rook gives him a farewell speech. Final shot: Ben drives off in the Rustbucket 3, smiling. |

For collectors and binge-watchers, the series is best viewed in production order rather than air date order to fully understand the story arcs involving Malware, the Incurseans, and the Time War.

This season explores more standalone sci-fi concepts, introduces Ben's cousin Clyde, and features the return of the Rooters.