Star Trek: Yesteryear

"Yesteryear" is the second episode of season one of Star Trek: The Animated Series and is the 86th episode released of all programs combined. The episode was directed by Hal Sutherland with a teleplay written by James Schmerer. The series was produced by Norm Prescott and Lou Scheimer of Filmation Associates with Star Trek regular D.C. Fontana serving as associate producer. The episode stars original cast members William Shatner, Leonard Nimoy and DeForest Kelley reprising their classic roles as Captain Kirk, Mister Spock and Bones. It first aired on NBC on September 15th, 1973.