On this day in the Star Trek universe:

Star Trek: The Next Generation (1992)

Star Trek: Discovery (2019)

Star Trek: The Next Generation

Season 5. Episode 18.

Episode entitled: Cause And Effect.

Released March 21, 1992.

Directed by Jonathan Frakes.

Written by Brannon Braga, René Echevarria.

Created by Gene Roddenberry.

Music by Dennis McCarthy.

Cast: Patrick Stewart, Jonathan Frakes, LeVar Burton, Michael Dorn, Gates McFadden, Marina Sirtis, Brent Spiner, Michelle Forbes, Patti Yasutake, Kelsey Grammer, Rachen Assapiomonwait, Michael Braveheart, Tracee Cocco, Debbie David, Eben Ham, Christina Wegler Miles, Victor Sein, John Alex Tampoya, Mikki Val.

Star Trek: Discovery

Season 2. Episode 10.

Episode entitled: The Red Angel.

Released March 21, 2019.

Directed by Hanelle M. Culpepper.

Created by Bryan Fuller, Alex Kurtzman.

Written by Chris Silvestri, Anthony Maranville, Kirsten Beyer, Sean Cochran.

Based on Star Trek, created by Gene Roddenberry.

Music by Jeff Russo.

Cast: Sonequa Martin-Green, Doug Jones, Anthony Rapp, Mary Wiseman, Wilson Cruz, Shazad Latif, Anson Mount, Michelle Yeoh, Jayne Brook, Ethan Peck, Alan Van Sprang, Sonja Sohn, Rachael Ancheril, Hannah Cheesman, Emily Coutts, Patrick Kwok-Choon, Oyin Oladejo, Ronnie Rowe, Sara Mitich, Jason Anthony, George Alevizos, Avaah Blackwell, James MacKinnon, Shelley Owens, Ronald Tang.