The Mad Doctor is a Mickey Mouse cartoon released in 1933. It is known as the first appearance of the title character "The Mad Doctor", or "Dr. XXX". It was the 52nd Mickey Mouse short film, and the second of that year.

Mickey Mouse is an American cartoon character co-created in 1928 by Walt Disney and Ub Iwerks. The longtime icon and mascot of the Walt Disney Company, Mickey is an anthropomorphic mouse who typically wears red shorts, large shoes, and white gloves.