Martin made many guest appearances on "Gunsmoke," including the two-part episode "Island in the Desert", in which he portrayed a crazy desert hermit named Ben Snow. He also made many guest appearances on "Perry Mason" throughout the nine-year run from 1957 to 1966, including a horseman in the 1962 episode "The Case of the Fickle Filly", a college employee in "The Case of the Brazen Bequest", and the murderer in "The Case of the Drowsy Mosquito". In 1963, he appeared in Glynis Johns' short-lived comedy series "Glynis" in the episode "Ten Cents a Dance". In 1965, Martin appeared in the episode "Most Precious Gold" of the NBC comedy/drama series "Kentucky Jones," starring Dennis Weaver. In 1965, he guest-starred as Meeker in the episode "Return to Lawrence" on the ABC Western "The Legend of Jesse James". In 1966, he guest-starred in the "Lost In Space" episode "Blast Off Into Space" as a gritty mining engineer named Nerim. On a "Gilligan's Island" episode, Martin played a man living supposedly alone on the island for a radio show contest. He also starred in a two-part "The Rockford Files" 1977 episode as T.T. Flowers "The Trees, the Bees and T. T. Flowers", an episode that took on urban invasion and the environment.