Crime · A mentally unstable Vietnam War veteran works as a night-time taxi driver in New York .. that Travis Bickle hears at the very end before the credits roll? Q: What is 'Taxi Driver' about? Q: How much sex, violence, and profanity are in this movie?. "If you came to Showtime's Masters of Sex pilot expecting to see some sort of Based on the Book by: Thomas Maier; Developed for Television by: Michelle Missing: positions. MASTERS OF SEX marks Sheen's first regular series role for television. The series is an adaptation of Thomas Maier's book Masters of Sex: The Life and Times Missing: positions.