On this day in the Star Trek universe:

Star Trek (1966 & 1967)

Star Trek: The Next Generation (1990)

Star Trek

Season 1. Episode 15.

Episode entitled: Shore Leave.

Released December 29, 1966.

Directed by Robert Sparr.

Written by Theodore Sturgeon.

Created by Gene Roddenberry.

Music by Alexander Courage, Gerald Fried.

Cast: William Shatner, Leonard Nimoy, Nichelle Nichols, DeForest Kelley, Emily Banks, Oliver McGowan, Perry Lopez, George Takei, Bruce Mars, Barbara Baldavin, Marcia Brown, Sebastian Tom, Shirley Bonne, Paul Baxley, Bill Blackburn, John Carr, Frank da Vinci, Jim Gruzalski, Jeannie Malone, Eddie Paskey, Ron Veto.

Star Trek

Season 2. Episode 15.

Episode entitled: The Trouble with Tribbles.

Released December 29, 1967.

Directed by Joseph Pevney.

Written by David Gerrold.

Created by Gene Roddenberry.

Music by Alexander Courage, Jerry Fielding.

Cast: William Shatner, Leonard Nimoy, Nichelle Nichols, DeForest Kelley, James Doohan, George Takei, Majel Barrett, William Schallert, William Campbell, Stanley Adams, Whit Bissell, Michael Pataki, Edwin Reimers, Walter Koenig, Charlie Brill, Paul Baxley, David L. Ross, Guy Raymond, Richard Antoni, Bobby Bass, Bill Blackburn, Dick Crockett, Frank da Vinci, Steve Hershon, Roger Holloway, William Frederick Knight, Jeannie Malone, Bob Miles, Bob Orrison, Eddie Paskey, Gary Wright.

Star Trek: The Next Generation

Season 4. Episode 10.

Episode entitled: The Loss.

Released December 29, 1990.

Directed by Chip Chalmers.

Written by Hilary J. Bader, Alan J. Adler, Vanessa Greene, Ronald D. Moore, Joe Menosky, David Carren, J. Larry Carroll.

Created by Gene Roddenberry.

Music by Dennis McCarthy.

Cast: Patrick Stewart, Jonathan Frakes, LeVar Burton, Michael Dorn, Gates McFadden, Marina Sirtis, Brent Spiner, Kim Braden, Mary Kohnert, Whoopi Goldberg, Majel Barrett, Michael Braveheart, Tracee Cocco, Debbie David, Denise Deuschle, Teri Noel, Keith Rayve, Joyce Robinson.