The Great Gazoo
The Great Gazoo is a tiny, green, floating alien who was exiled to Earth from his home planet Zetox. Gazoo was discovered by Fred and Barney when his flying saucer crashed; Gazoo recognizes Fred's and Barney's world as prehistoric Earth, implying Zetox banished him through time as well as space. He first appeared on the show on October 29, 1965. The Great Gazoo was voiced by actor Harvey Korman.