S4·E3 Mouse Brain Take-Over / Leslie Makes it Big
Aired October 11, 2011
Synopsis
Mr. Big is arrested, leaving it to his assistant, Leslie, to carry out their latest evil plan: building the world's most powerful mind-control device; WordGirl learns that Dr. Two-Brains is on an all-out cheese rampage just as she's about to give a tour of her secret hideout to the winner of the WordGirl Synonym Contest.