On this day in the Star Trek universe - The Next Generation, Voyager, Enterprise:

Star Trek: The Next Generation (1990)
Star Trek: Voyager (1999)
Star Trek: Enterprise (2004)

Star Trek: The Next Generation
Season 3. Episode 24.

Episode entitled: Ménage à Troi.

Released May 26, 1990.

Directed by Robert Legato.

Written by Fred Bronson, Susan Sackett, Ronald D. Moore.

Created by Gene Roddenberry.

Music by Ron Jones.

Cast: Patrick Stewart, Jonathan Frakes, LeVar Burton, Michael Dorn, Gates McFadden, Marina Sirtis, Brent Spiner, Wil Wheaton, Majel Barrett, Frank Corsentino, Ethan Phillips, Peter Marx, Rudolph Willrich, Carel Struycken, Rachen Assapiomonwait, Nyra Crenshaw, Shana Golden, Eben Ham, Randy James, Casey Kono, Tim McCormack, Lorine Mendell, Ivonne Perez Montijo, Rick Sandford, Victor Sein.

Star Trek: Voyager
Season 5. Episode 25.

Episode entitled: Equinox.

Released May 26, 1999.

Directed by David Livingston.

Created by Rick Berman, Michael Piller, Jeri Taylor.

Written by Brannon Braga, Joe Menosky, Rick Berman, Bryan Fuller, Nick Sagan, Michael Taylor.

Based on Star Trek, created by Gene Roddenberry.

Music by Jay Chattaway.

Cast: Kate Mulgrew, Robert Beltran, Roxann Dawson, Robert Duncan McNeill, Ethan Phillips, Robert Picardo, Tim Russ, Garrett Wang, Jeri Ryan, John Savage, Titus Welliver, Olivia Birkelund, Rick Worthy, Scarlett Pomers, Steven Dennis, Majel Barrett, John Austin, Steve Blalock, Tarik Ergin, Peter Scott Harmyk, Kerry Hoyt, Keith Rayve, Richard Sarstedt, Brian Simpson.

Star Trek: Enterprise
Season 3. Episode 24.

Episode entitled: Zero Hour.

Released May 26, 2004.

Directed by Allan Kroeker.

Written by Rick Berman, Brannon Braga, 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 Jay Chattaway.

Cast: Scott Bakula, John Billingsley, Jolene Blalock, Dominic Keating, Anthony Montgomery, Linda Park, Connor Trinneer, Scott MacDonald, Rick Worthy, Tucker Smallwood, Josette Di Carlo, Bruce Thomas, Andrew Borba, Matt Winston, Mary Mara, Ruth Williamson, Jeffrey Combs, Gunter Ziegler, J. Paul Boehmer, Zachary Aaron Krebs, Alexandrea Ortiz, Alina Andrei, Daphney Damaraux, Kevin Derr, Yuri Elvin, Ian Eyre, Glen Hambly, Dieter Horneman, Andrew Macbeth, Dorenda Moore, Michael O'Laskey II, Bob Rivers, Paul Sklar, Amy Ulen.