Martin utilised the new technology of cassette tapes, and disseminated many of his public lectures about apologetics questions and cultic groups to thousands worldwide. Several albums were released on "The World of the Cults", "The World of the Occult", "The New Cults", "How To Witness to Jehovah's Witnesses", and "How to Witness to Mormons". Other albums tackled general apologetics "To Every Man An Answer", and topical problems such as abortion, homosexuality and women's liberation ("Martin Speaks Out"). He later appeared in a series of six films produced by Vision House called "Martin Speaks Out on the Cults".