By the late 1960s, Martin was almost as well-known a figure as many top-billed stars. In 1967, the same year as his role in "Cool Hand Luke", he appeared in the episode "A Mighty Hunter Before the Lord" of NBC's "The Road West" series starring Barry Sullivan. In 1972, he appeared as James Garner's uncle in the "Zacharia" episode of NBC's "Nichols". He also had a pronounced physical and vocal resemblance to playwright Tennessee Williams and occasionally parodied him, notably in the "Baby Fat" episode of "The Dick Van Dyke Show".