On this day in the Star Trek universe:

Star Trek (1968)

Star Trek

Season 3. Episode 13.

Episode entitled: Elaan of Troyius.

Released December 20, 1968.

Directed by John Meredyth Lucas.

Written by John Meredyth Lucas, Arthur H. Singer.

Created by Gene Roddenberry.

Music by Alexander Courage.

Cast: William Shatner, Leonard Nimoy, DeForest Kelley, James Doohan, George Takei, Walter Koenig, Nichelle Nichols, Majel Barrett, France Nuyen, Jay Robinson, Tony Young, Lee Duncan, Victor Brandt, Dick Durock, Charles Beck, K.L. Smith, Hal Baylor, Bill Blackburn, Frank da Vinci, Roger Holloway, Jeannie Malone, Eddie Paskey, Frieda Rentie.