Paul Newman researched the role by spending time at radio station KMPC in Los Angeles. The teen intern assigned to show him the operation was Ken Levine, who became a disc jockey before going on to be a writer on M*A*S*H (1972), Cheers (1982) and Frasier (1993), and a producer and director of other TV shows.
Anthony Perkins was nominated for best supporting actor of the year by the National Society of Film Critics.
The famed Preservation Hall Jazz Band of New Orleans appears in the film. Preservation Hall on St. Peter Street has been a venue for New Orleans jazz since 1961.
The film cast includes three Oscar winners: Paul Newman, Joanne Woodward and Cloris Leachman; and three Oscar nominees: Anthony Perkins, Laurence Harvey and Diane Ladd.
This went into production as "Hall of Mirrors", the title of Robert Stone's original novel.