On this day in the Star Trek universe:

Star Trek (1966 & 1967)

Star Trek: The Next Generation (1990)

Star Trek: Voyager (1999)

Star Trek

Season 1. Episode 7.

Episode entitled: What Are Little Girls Made Of?

Released October 20, 1966.

Directed by James Goldstone.

Written by Robert Bloch.

Created by Gene Roddenberry.

Music by Alexander Courage, Fred Steiner.

Cast: William Shatner, Leonard Nimoy, Nichelle Nichols, Michael Strong, Sherry Jackson, Ted Cassidy, Majel Barrett, Harry Basch, Vince Deadrick Sr., Budd Albright, Eddie Paskey.

Star Trek

Season 2. Episode 6.

Episode entitled: The Doomsday Machine.

Released October 20, 1967.

Directed by Marc Daniels.

Written by Norman Spinrad.

Created by Gene Roddenberry.

Music by Alexander Courage, Sol Kaplan.

Cast: William Shatner, Leonard Nimoy, Nichelle Nichols, DeForest Kelley, James Doohan, George Takei, William Windom, Elizabeth Rogers, John Winston, Richard Compton, John Copage, Tim Burns, Jerry Catron, Bill Blackburn, Roger Holloway, Jeannie Malone, Eddie Paskey, Frieda Rentie.

Star Trek: The Next Generation

Season 4. Episode 5.

Episode entitled: Remember Me.

Released October 20, 1990.

Directed by Cliff Bole.

Written by Lee Sheldon, Ronald D. Moore, Joe Menosky.

Created by Gene Roddenberry.

Music by Jay Chattaway.

Cast: Patrick Stewart, Jonathan Frakes, LeVar Burton, Michael Dorn, Gates McFadden, Marina Sirtis, Brent Spiner, Wil Wheaton, Eric Menyuk, Bill Erwin, Colm Meaney, Majel Barrett, Nyra Crenshaw, Robert Daniels, K. Uchizono.

Star Trek: Voyager

Season 6. Episode 5.

Episode entitled: Alice.

Released October 20, 1999.

Directed by David Livingston.

Created by Rick Berman, Michael Piller, Jeri Taylor.

Written by Bryan Fuller, Michael Taylor, Juliann deLayne, Robert Doherty.

Based on Star Trek, created by Gene Roddenberry.

Music by David Bell.

Cast: Kate Mulgrew, Robert Beltran, Roxann Dawson, Robert Duncan McNeill, Ethan Phillips, Robert Picardo, Tim Russ, Garrett Wang, Jeri Ryan, Claire Rankin, John Fleck, Michael Bailous, Nichole McAuley, Pablo Soriano.