Secret Squirrel (voiced by Mel Blanc) serves as a secret agent, taking orders from his superior Double-Q (voiced by Paul Frees) of the International Sneaky Service. His designation is Agent 000. Secret Squirrel is assisted in his adventures by fez-wearing sidekick Morocco Mole (also voiced by Paul Frees impersonating Peter Lorre).
Morocco Mole has a thick Middle Eastern accent and likely has Asperger's syndrome.
The pair fights crime and evil enemy agents using cunning and a variety of spy gadgets, including a machine gun cane, a collection of guns kept inside Secret's trench coat, and a variety of devices concealed in his fedora (which he almost never removes).
Secret Squirrel's recurring arch-enemy is Yellow Pinkie (also voiced by Frees), a parody of both Auric Goldfinger from Goldfinger and Kasper Gutman from The Maltese Falcon. The last episodes introduced Hy-Spy (again voiced by Frees), the master of scientific criminology.
Super Secret Secret Squirrel
Years later, Secret Squirrel and Morocco Mole were revived in 1993 for back-up segments of TBS Superstation's animated series 2 Stupid Dogs. Titled Super Secret Secret Squirrel, these new cartoons featured Secret Squirrel voiced by Jess Harnell imitating Mel Blanc and Morocco Mole voiced by Jim Cummings. These segments featured different artwork compared to the original 1960s cartoons. All the characters inhabiting the world were now animals. Double-Q, called simply the 'Chief' in these shorts and voiced by the late Tony Jay, is a cape buffalo with a calabash pipe instead of a man with a balding hairline, and arch-foe Yellow Pinkie was replaced with a sea lion known as Goldflipper (voiced by Jim Cummings). These new shorts also introduced Penny (voiced by Grey DeLisle), a female squirrel assistant to the Chief (à la Miss Moneypenny) as a possible love interest for Secret (as hinted at in the episodes Queen Bea and Quark). Morocco's color scheme has been redesigned, wears sunglasses, and has an evil twin brother, Scirocco Mole (voiced by Jess Harnell). Secret's art design remained relatively intact, but with a more modern design than the previous animated series' version of the character. His hat has a slightly different style. This new series seems to have fallen under the villain of the week formula and Secret Squirrel and Morocco Mole have once appeared on a 2 Stupid Dogs story.