On this day in the Star Trek universe:

Star Trek: The Next Generation (1989)

Star Trek: Voyager (1996)

Star Trek: The Next Generation

Season 2. Episode 11.

Episode entitled: Contagion.

Released March 18, 1989.

Directed by Joseph L. Scanlan.

Written by Steve Gerber, Beth Woods, Leonard Mlodinow, Scott Rubenstein, Melinda M. Snodgrass.

Created by Gene Roddenberry.

Music by Dennis McCarthy.

Cast: Patrick Stewart, Jonathan Frakes, LeVar Burton, Michael Dorn, Marina Sirtis, Brent Spiner, Wil Wheaton, Colm Meaney, Diana Muldaur, Thalmus Rasulala, Carolyn Seymour, Dana Sparks, Folkert Schmidt, Majel Barrett, James G. Becker, Juliet Cesario, Dexter Clay, Tim McCormack, Lorine Mendell.

Star Trek: Voyager

Season 2. Episode 21.

Episode entitled: Deadlock.

Released March 18, 1996.

Directed by David Livingston.

Created by Rick Berman, Michael Piller, Jeri Taylor.

Written by Brannon Braga, Lisa Klink.

Based on Star Trek, created by Gene Roddenberry.

Music by Dennis McCarthy.

Cast: Kate Mulgrew, Robert Beltran, Roxann Biggs-Dawson, Jennifer Lien, Robert Duncan McNeill, Ethan Phillips, Robert Picardo, Tim Russ, Garrett Wang, Nancy Hower, Simon Billig, Bob Clendenin, Ray Proscia, Keythe Farley, Chris Johnston, Majel Barrett, Steve Carnahan, Tarik Ergin, Emily Leibovitch, Louis Ortiz, John Alex Tampoya.