The Great Gildersleeve (1941-1957), initially written by Leonard L. Levinson, [1] was arguably the first spin-off program in broadcast history. Built around a character who had been a staple on the classic radio situation comedy Fibber McGee and Molly, The Great Gildersleeve enjoyed its greatest success in the 1940s. Actor Harold Peary played the character during its transition from the parent show into the spin-off and later in a quartet of feature films released at the height of the show's popularity.

On Fibber McGee and Molly, Peary's Gildersleeve was a pompous windbag who became a consistent McGee nemesis ("You're a haa-aa-aa-aard man, McGee!" became a Gildersleeve catch phrase). But he also became a popular enough windbag that Kraft Foods — looking primarily to promote its Parkay margarine spread — sponsored a new series with Peary's Throckmorton P. Gildersleeve (the character was given several conflicting first names on Fibber McGee and Molly, and on one episode of that show revealed his middle name as Philharmonic) as the central, slightly softened, and slightly befuddled focus of a lively new family.