Jim'll Fix It is a British television series broadcast by the BBC, presented by Jimmy Savile and running for almost two decades, between May 1975 and July 1994. Devised by Bill Cotton, the show encouraged children to write a letter to Savile with a "wish" that would come true at the end of each episode, upon which the child would be granted a medal. Famous people who appeared on the show included Muhammad Ali, Doctor Who stars Tom Baker and Colin Baker, Rolf Harris, Gary Glitter, Margaret Thatcher and Peter Cushing.