[3] Secret Squirrel is assisted in his adventures by his fez-wearing, bespectacled sidekick Morocco Mole (also voiced by Paul Frees impersonating Peter Lorre).

[4] The pair fights crime and evil enemy agents using cunning and a variety of spy gadgets, including a machine gun cane, a collection of weapons kept inside Secret's trench coat which is also bulletproof, and a variety of devices concealed in his purple fedora (which has eye holes cut in it and which he seldom removes).

The 1993 reboot segments saw several changes in characters and artwork compared to the 1960s original cartoons, including the recasting of Jess Harnell as Secret and Jim Cummings as Morocco (as Blanc and Frees had both died several years prior).

Double-Q (voiced by Tony Jay), now simply called "the Chief" in these shorts, is a Cape buffalo with a sour cherry-scented calabash pipe.

Yellow Pinkie has been replaced by a sea lion named Goldflipper (voiced by Jim Cummings) who, despite being Secret's archenemy, only appears in one episode of the revival series.

These new cartoons also introduce Penny (voiced by Kimmy Robertson), a female squirrel assistant to the Chief (à la Miss Moneypenny) and a possible love interest for Secret (as hinted at in the episodes "Queen Bea" and "Quark").

Secret's art design remains relatively intact, but looks more modern than the original 1960s version of the character, featuring hard lines and sharper angles, giving him a leaner and more slick style.

The Chief speaks with a British accent now (due to being voiced by Tony Jay), as evidenced by his catchphrase "Good show, Secret".

Secret Squirrel and Morocco Mole were revived in 1993 for back-up segments of the first season of TBS Superstation's animated series 2 Stupid Dogs.

Mel Blanc reprised his role as Secret Squirrel, but Daws Butler voiced Morocco Mole instead of Paul Frees.

Warner Archive released The Secret Squirrel Show: The Complete Series on DVD in Region 1 as part of their Hanna–Barbera Classics Collection in November 2015.

The phrase "Secret Squirrel stuff" is used by people working in U.S. intelligence to lightheartedly describe material that is highly classified, usually as a non-answer to a question.