Billy Curtis (1909-1938) was a little person actor who appeared in three Superman-related TV projects in the 1950s. He played the lead Mole Man in Superman and the Mole Men (1951), in heavy make-up and costume. In 1957, he was the featured guest actor in the fifth season Adventures of Superman episode "Mr. Zero." Curtis played the title character, a friendly Martian, with his own face fully recognizable beneath a green wig.
In 1958, Curtis played the leading role in the authorized spoof/children's show pilot The Adventures of Superpup. In a dog suit, and with all dialogue dubbed by another actor, Curtis played the dual role of Superpup and his civilian alter-ego, Bark Bent.