After seeing the Beatles perform on "The Ed Sullivan Show", Brodax approached the band's management with the idea of producing an animated series featuring the Fab Four. The series, of which 39 episodes were produced, premiered on September 25, 1965, on ABC. He was later involved in the production of the Beatles' animated film, "Yellow Submarine", for United Artists, as producer and co-screenwriter. From 1969 to 1980, Brodax worked as a freelance producer, writer, lyricist and director. He supervised animation for ABC's "Make a Wish" (1971–76), and "Animals, Animals, Animals" (1976–81).