[s4e23] Let's Do The Time War Again May 2026

: Professor Paradox and Ben 10,000 arrive to reverse time and guide Ben and Rook through the chaos.

This episode is popular among fans for showcasing several unique fusions and transformations: [S4E23] Let's Do the Time War Again

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. : Professor Paradox and Ben 10,000 arrive to

: 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 : After several failed loops that result in

: Ben's future self, who uses the Biomnitrix to fuse alien forms.