3x15 - Totally Spies!

Sam and Alex confront Clover about slacking off during their missions. After losing track of Clover on their next mission, they find she has single-handedly defeated the villain. Suddenly, Clover is acting differently. Her spy skills keep getting better and better. When Sam and Alex investigate, they find out that Geraldine, head of rival agency S.P.I., has secretly modified Clover into a super agent so she can recruit her. In the climax, it's Sam and Alex versus the super agent Clover to try and get their best friend back. In a b-story, Clover's busy social life is interrupted when she becomes a super agent.