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. This short is in the public domain, because Disney did not renew the copyright as was required at the time. However, elements of the short, including Pluto and aspects of Mickey's design, remain under copyright until 2029 at the latest. ()