Who voiced the Great Gazoo in the original series?

Harvey Korman voiced the Great Gazoo in the original Flintstones series.

Gazoo is a tiny, green, floating alien scientist from the planet Zetox. He is exiled to prehistoric Earth after inventing a doomsday device and is discovered by Fred Flintstone and Barney Rubble after his flying saucer crashes. Gazoo calls them “dum-dums” and repeatedly tries to solve their problems with futuristic powers.

The character first appeared in the sixth-season episode “The Great Gazoo,” which aired in 1965. His abilities include teleportation, materializing objects, freezing time, and traveling through time, but his interventions usually make Fred and Barney’s troubles worse.

Gazoo was introduced near the end of the show’s run and appeared in 11 episodes across 1965 and 1966. Because he was such an overtly fantastical addition to a sitcom otherwise built around Stone Age domestic life, some viewers regard him as an example of the series straying from its original premise.