"The Devil & Peter Tork"

According to Andrew Sandoval's The Monkees: The Day-by-Day Story of the 60s TV Pop Sensation, "The Devil & Peter Tork" - the fifty-second episode of The Monkees series (and the twentieth of the second season) - was broadcast fifty years ago to-day (5 February 1968).  It was written by Gerald Gardner, Dee Caruso, and Robert Kaufman, directed by James Frawley, and featured the songs "Salesman" and "No Time."  Sandoval describes the plot as: "Peter sells his soul to the Devil (Monte Landis) during a lesson in music and morality."