: To make amends, Helen and Manny decide to enter the Null Void themselves to find and rescue the people they wrongfully imprisoned. Key Characters & Transformations

: Ben uses forms like Big Chill and Swampfire during the encounters.

The 12th episode of Ben 10: Alien Force Season 1 is titled . In this episode, Ben and his team encounter two rogue Plumber offspring, Manny Armstrong and Helen Wheels , who have been hunting aliens and trapping them in what they believe is a "disintegrator ray"—which is actually a Null Void Projector . Episode Summary

: Manny (a half-Tetramand) and Helen (a half-Kineceleran) mistake Ben, Gwen, and Kevin for dangerous aliens.

: After a brief skirmish, the duo manages to kidnap Kevin Levin for questioning, unsure of his species or intentions.

: Ben and Gwen Tennyson track them down to rescue Kevin. During the fight, Ben is temporarily thrown into the Null Void as Swampfire but manages to escape.

: Manny and Helen share the same abilities as Ben's classic aliens, Four Arms and XLR8 , respectively.

Watch these recaps and reactions to see Manny and Helen in action against Ben's team: