|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.
- Ben abandons Team Tennyson and joins the Forever Knight's cause.
- 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.