Multi-talanted dwarf actor Michael Dunn guest-stars as George Marshall, a former circus midget who, fulfilling a promise to his late wife, gives up show business to lead a normal life in Virginia City. Despite the assistance of his friend Ben Cartwright, George is unable to secure employment because of his size, thus he turns to crime. The story reaches a climax when the daughter of George's chief tormenter, banker John Flint (Edward Binns), is trapped in a very narrow mine shaft. Written by directed by Bonanza star Michael Landon, "It's a Small World" first aired January 4, 1970. ~ Hal Erickson, Rovi