|This article belongs to the Reboot Continuity|
Roundabout: Part 1 is the one hundred and nineteenth episode of Ben 10.
Ben is gone. Grandpa asks his old friend Phil for help. Since Ben's watch sends out signals, they can track him down. He is in Switzerland. Together, they set off to find out why Ben ran away and landed on the side of Forever Knight.
- Because of the events of The Night Ben Tennyson Came to Town, Ben joins the Forever Knight out of spite for his family.
- The Forever Knight constructs a time portal.
- Gwen, Grandpa Max, and Phil are left behind in the present to battle Kevin, Charmcaster, Billy Billions, Vin Ethanol, and Simon Sez.
- Phil is revealed to have found a method for tracking the Omnitrix's whereabouts after Omni-Tricked: Part 4.