Popeye the Sailor Man was created by Elzie Crisler Segar. He first appeared in the daily King Features comic strip Thimble Theatre on January 17, 1929. Although Segar's Thimble Theatre strip was in its tenth year when Popeye made his debut, the sailor quickly became the main focus of the strip and Thimble Theatre soon became one of King Features' most popular properties during the 1930s. Thimble Theatre was continued after Segar's death in 1938 by several writers and artists, most notably Segar's assistant Bud Sagendorf.
Popeye was adapted to radio in several series broadcast over three different networks by two sponsors from 1935 to 1938. Popeye and most of the major supporting characters were first featured in a thrice-weekly 15-minute radio program, Popeye the Sailor, which starred Detmar Poppen as Popeye along with most of the major supporting characters - Olive Oyl (Olive Lamoy), Wimpy (Charles Lawrence), Bluto (Jackson Beck) and Swee'Pea (Mae Questel). In the first episode, Popeye adopted Sonny (Jimmy Donnelly), a character later known as Matey the Newsboy. This program was broadcast Tuesday, Thursday and Saturday nights at 7:15pm. September 10, 1935 through March 28, 1936 on the NBC Red Network (87 episodes), initially sponsored by Wheatena, a whole-wheat breakfast cereal, which would routinely replace the spinach references. Music was provided by Victor Irwin's Cartoonland Band. Announcer Kelvin Keech sang (to composer Lerner's "Popeye" theme) "Wheatena is his diet / He asks you to try it / With Popeye the sailor man." Wheatena paid King Features Syndicate $1,200 per week.
The show was next broadcast Mondays, Wednesdays and Fridays from 7:15 to 7:30pm on WABC and ran from August 31, 1936 to February 26, 1937 (78 episodes). Floyd Buckley played Popeye, and Miriam Wolfe portrayed both Olive Oyl and the Sea Hag. Once again, reference to spinach was conspicuously absent. Instead, Popeye sang, "Wheatena's me diet / I ax ya to try it / I'm Popeye the Sailor Man".
The third series was sponsored by the maker of Popsicle three nights a week for 15 minutes at 6:15 pm on CBS from May 2, 1938 through July 29, 1938. Of the three series, only 20 of the 204 episodes are still known to exist. (Source: wikipedia.org)