Bite-Sized The New Adventures of Batman : Season 1 Episode 6

A super-villain from another planet, known as Electro, reduces Batman and Robin in size using a shrinking ray. Then, he uses a mind-controlling gas on his two small captives, and orders them to steal some top-secret plans from the government, Batman and Robin have to snap out of their hypnotized state, and figure out a way to return to their normal size.