Secret Squirrel is a cartoon squirrel create by Hanna-Barbera. Secret Squirrel was one of two co-stars of The Atom Ant/Secret Squirrel Show, which debuted in 1965. He was given his own show in 1966, but was reunited with Atom Ant for one more season in 1967. Secret first appeared in a primetime animated special called The World of Atom Ant and Secret Squirrel, which aired on NBC on September 12, 1965.