Watch FMovies. A film about Timothy Leary's life and death. Dr. Timothy Francis Leary (October 22, 1920 -- May 31, 1996) was an American writer, psychologist, futurist, and advocate of psychedelic drug research. An icon of 1960s counterculture, Leary is most famous as a proponent of the therapeutic, spiritual and emotional benefits of LSD. He coined and popularized the catch phrase "Turn on, tune in, drop out."