The Hanna-Barbera cartoons of the mid-'60s aren't best remembered for their satirical properties. But Secret Squirrel, upon his debut in 1965, quickly gained an audience by satirizing the popular spy/espionage genre.

As Agent 000, Secret Squirrel undertook covert missions using intel from his boss, Double Q; assistance from his trusty sidekick Morocco Mole; and an impressive cache of state-of-the-art gadgets.

Voiced by the incomparable Mel Blanc, Secret Squirrel generally appeared in a grey trench coat and a purple fedora with eye slots. Morocco Mole (voiced by Paul Frees) conversely wore a red fez and glasses. They foiled bad guys for three seasons, producing 39 original episodes by 1968.

The duo briefly resurfaced during the '70s as part of the series, Yogi's Gang. Agent 000 also cropped up in 1993's 2 Stupid Dogs. But despite their appeal as merchandising stars during their short '60s reign and subsequent short-lived revivals, Secret Squirrel and Morocco Mole have never experienced a full-scale renaissance.