: Available as Season 1, Episode 73 in certain regions.
: Professor Paradox and Ben 10,000 arrive to reverse time and guide Ben and Rook through the chaos.
: After several failed loops that result in the city's destruction, future and past versions of Ben and Rook team up to capture the Time Beast and revert it to an egg using newly built Time Cycles . Key Characters & Villains [S4E23] Let's Do the Time War Again
This episode is popular among fans for showcasing several unique fusions and transformations:
: In the first attempt, Ben's electrical powers as Feedback collide with a Time Beast’s temporal energy, freezing Bellwood in time. : Available as Season 1, Episode 73 in certain regions
The plot kicks off with a car accident in Undertown that unearths a nest of . Ben and Rook are forced into a repeating cycle of events as they attempt to stop the villains Eon , Exo-Skull , and Subdora from stealing the eggs.
: Ben's future self, who uses the Biomnitrix to fuse alien forms. Key Characters & Villains This episode is popular
: A fusion of Upgrade and Juryrigg used to repair and enhance the Time Cycles. Big Chuck : A fusion of Way Big and Upchuck .