Weapon XI: Part 1 is the fifty-ninth episode of Ben 10: Omniverse.
The episode start on the Albright farm, where Alan can be seen entering to their warehouse. He goes in, turns into his Pyronite form, lights up a candle and turns back. He begins working on his car when suddenly the doors open. He stands up and sees Kevin Levin who greets him nicely along with Argit and Zed. Alan reminds him that he drained his powers last time he showed up. He tells them to get out of his property but Kevin wants give his memories back, however, Alan thinks he wants to attack him. Argit tells him that he is not in danger but suddenly Swift appears by breaking the roof and spots on Alan. They begin to fight...
Proctor turns the amalgam kids evil, and convinces Kevin to join the Rooters.
Ben was the coming storm Proctor was talking about.
Ben can control Alien X.
- Ben Tennyson
- Rook Blonko
- Gwen Tennyson
- Kevin Levin (present and flashback)
- Amalgam Kids
- Alan's donor (flashback)