On this day in the Star Trek universe:

Star Trek: The Next Generation (1988)

Star Trek: Voyager (1997)

Star Trek: Enterprise (2003)

Star Trek: The Next Generation

Season 1. Episode 20.

Episode entitled: The Arsenal of Freedom.

Released April 9, 1988.

Directed by Les Landau.

Written by Richard Manning, Hans Beimler, Maurice Hurley, Robert Lewin, Hannah Louise Shearer, Tracy Tormé.

Created by Gene Roddenberry.

Music by Dennis McCarthy.

Cast: Patrick Stewart, Jonathan Frakes, LeVar Burton, Denise Crosby, Michael Dorn, Gates McFadden, Marina Sirtis, Brent Spiner, Wil Wheaton, Vincent Schiavelli, Marco Rodríguez, Vyto Ruginis, Julia Nickson, George De La Pena, James G. Becker, Richard Sarstedt.

Star Trek: Voyager

Season 3. Episode 21.

Episode entitled: Before and After.

Released April 9, 1997.

Directed by Allan Kroeker.

Created by Rick Berman, Michael Piller, Jeri Taylor.

Written by Kenneth Biller, Lisa Klink.

Based on Star Trek, created by Gene Roddenberry.

Music by Jay Chattaway.

Cast: Kate Mulgrew, Robert Beltran, Roxann Biggs-Dawson, Jennifer Lien, Robert Duncan McNeill, Ethan Phillips, Robert Picardo, Tim Russ, Garrett Wang, Tim Russ, Jessica Collins, Michael Maguire, Christopher Aguilar, Janna Michaels, Rachael Harris, Majel Barrett, Steve Carnahan, John Copage, Damaris Cordelia, Debbie David, Tarik Ergin, Jennifer Gundy, Grace Harrell, Susan Henley, Nichole McAuley, Louis Ortiz, Richard Sarstedt, Hallie Singleton, Scott Strozier, John Alex Tampoya.

Star Trek: Enterprise

Season 2. Episode 19.

Episode entitled: Judgment.

Released April 9, 2003.

Directed by James L. Conway.

Written by David A. Goodman, Taylor Elmore, André Bormanis.

Created by Rick Berman, Brannon Braga.

Based on Star Trek, created by Gene Roddenberry.

Opening theme song: Faith of the Heart, performed by Russell Watson.

Closing theme: Archer's Theme, by Dennis McCarthy.

Music by Velton Ray Bunch.

Cast: Scott Bakula, John Billingsley, Jolene Blalock, Dominic Keating, Anthony Montgomery, Linda Park, Connor Trinneer, J.G. Hertzler, John Vickery, Granville Van Dusen, Daniel Riordan, Victor Talmadge, Helen Cates, D.J. Lockhart-Johnson, Danny Kolker, Alexandrea Ortiz, Joseph Billingiere, Solomon Burke Jr., Mark Correy, Evan English, Dieter Horneman, Lidia Sabljic.