On this day in the Star Trek universe:

Star Trek (1967)

Star Trek

Season 2. Episode 14.

Episode entitled: Wolf in the Fold.

Released December 22, 1967.

Directed by Joseph Pevney.

Written by Robert Bloch.

Created by Gene Roddenberry.

Music by Alexander Courage.

Cast: William Shatner, Leonard Nimoy, Nichelle Nichols, DeForest Kelley, James Doohan, George Takei, Majel Barrett, John Fiedler, Pilar Seurat, Charles Dierkop, Joseph Bernard, Tanya Lemani, John Winston, Virginia Aldridge, Judith McConnell, Judi Sherven, Bill Blackburn, Marlys Burdette, Steve Hershon, Suzanne Lodge, Eddie Paskey, Gary Wright.