 He played an eccentric inventor in an early "Adventures of Superman" episode called "The Runaway Robot".Littlefield played many character roles in other TV shows of the 1950s, such as "Blondie", "Lassie", "Dragnet" and "Peter Gunn".He died of natural causes in 1960 at a veterans' hospital in Hollywood, California, and was buried in Glendale's Forest Lawn Memorial Park Cemetery.