Batman: Season 3, Episode 25

3 - 25: The Entrancing Dr. Cassandra

As sorceress Dr. Cassandra tries to steal the valuable Mope Diamond from Spiffany's Jewelry Salon, she blasts Batman, Robin, and Batgirl with her Alvino-ray gun. With a flash of psychedelic colors, the Terrific Trio are literally flattened paper-thin.