Episode Title:Operation: Terrible Thirteen.Episode Description:An experiment was stolen from a lab, and at the same time, children who are having 13th birthdays become mutated. The Spiez are sent to investigate and discover that a girl named Kat is behind it all. She was disappointed in her birthdays, so she wants to get revenge by turning other rich children into mutants during their birthdays, and therefore have the biggest party on the block. In the B-story, Megan tries to act cool so she can be invited to Tami's birthday party so she can prove to her brothers how cool she is. Tami gets mutated, gaining wide hips and a massive butt.