The Atom Ant/Secret Squirrel Show is an hour-long Saturday morning cartoon produced by Hanna-Barbera Productions from 1965 to 1967 for NBC.

The Atom Ant Show featured the tiny superhero Atom Ant, with additional segments The Hillbilly Bears and Precious Pupp.

For the series' final NBC run under the Atom Ant/Secret Squirrel title, the show was a half-hour long.

[3] On September 12, 1965, the series had an hour-long primetime preview on NBC called The World of Secret Squirrel and Atom Ant or The World of Atom Ant and Secret Squirrel.

[4] The Hillbilly Bears cartoon segments repeated during the second season of The Banana Splits Adventure Hour (1969–1970), and all 52 Atom Ant and Secret Squirrel half-hour episodes were syndicated as part of The Banana Splits and Friends Show, an umbrella title for a package combining episodes of several different Hanna-Barbera series (the other series included The Banana Splits Adventure Hour, The New Adventures of Huckleberry Finn and The Adventures of Gulliver).