Casey Kasem, whose voice portrays "Mark," commander of G-Force, has voiced characters in more than 800 animated shows and thousands of commercials. During the 1950s and '60s he was a leading disc jockey in Detroit, Cleveland, San Francisco and Los Angeles. He created American Top 40, the syndicated radio concept of cycle-programming the 40 most popular records, which is now being heard on more than 400 stations. Kasem's many TV appearances include Police Story, Hawaii Five-O and The Dean Martin Show. He also costars in two upcoming theatrical motion pictures: The Dark and Jet Set Disco.
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