Martin was also a radio broadcaster who began this side of his ministry on Barnhouse's program. In the mid-1960s Martin regularly appeared as a guest panelist on "The Long John Nebel Show", and then founded his own program known as "The Bible Answer Man." Between the mid-1960s until his death in 1989 Martin debated in public various non-Christians such as atheist author/activist Madalyn Murray O'Hair and Hugh Schonfield, theologians of Liberal Christianity like Thomas J. J. Altizer and Bishop John Shelby Spong, and new religious commentators like Roy Masters. He appeared many times on the John Ankerberg television show debating advocates of Freemasonry, the Bahaʼi Faith, and other groups.