"My Sister the Spy!" is the first segment of the third episode of Teamo Supremo.
Crandall's sister Jean gets a locket as a present from a French boy. Meanwhile, Teamo Supremo keeps trying to defeat a group of French thugs, but the thugs are always one step ahead of them. Captain Crandall finds out that the locket Jean has is a walkie talkie for the thugs which lets them know what Teamo Supremo is planning.