Stolen Voices, Buried Secrets Season 1 Episode 15 Split Personality

The mask breaks in two when Walter punches it. Stanley tries on a half-mask and finds that it still works--on half his body. Stanley and The Mask can co-exist at the same time! But now the race is on for Stanley to find the other half-mask before Walter does. But neither is the first to find the other half: Stanley's archenemy from high school, Chet Bozak, don's the other half-mask. Now it's Stanley vs. Chet as the battle of the Half Masks rages!