On this day in the Star Trek universe:

Star Trek (1969)

Star Trek

Season 3. Episode 15.

Episode entitled: Let That Be Your Last Battlefield.

Released January 10, 1969.

Directed by Jud Taylor.

Written by Oliver Crawford, Gene L. Coon / Lee Cronin, 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, Frank Gorshin, Lou Antonio, Bill Blackburn, Frank da Vinci, Roger Holloway, Jeannie Malone, Frieda Rentie.