Ben 10: Ultimate Alien
At the beginning of the episode, Kevin attacks and steals the powers of the half-human Alan Albright, but is driven off by Ben before he can kill him. Alan reveals that Kevin has already stolen the powers of all of the Plumbers’ Helpers as well as Ben’s old foe Dr. Viktor. Ben, convinced that he must eliminate Kevin for the safety of the Earth, asks Gwen to help track Kevin with her powers. Gwen refuses, and the two argue, which leads to them battling each other; Ben defeats Gwen with Way Big, claiming her sentimentality prevents her from having what it takes to deal with Kevin. Ben then indiscriminately seeks out other villains, attacking them mercilessly in search of Kevin’s whereabouts. Gwen, meanwhile, locates their old enemy Michael Morningstar and asks for his help. Ben and Gwen separately consult Grandpa Max about how to deal with Kevin; while Max encourages Gwen to stay out of Ben’s way, he admits to Ben that his decision to kill Kevin is unlike him.