Template:Realworld
- For information dealing with this year in the timeline of the fictional Star Trek universe, see 1989.
Production
January
- 9 January - TNG: "Loud As A Whisper" airs.
- 23 January - TNG: "The Schizoid Man" airs.
- 30 January - TNG: "Unnatural Selection" airs.
- Pocket TNG #4: Survivors by Jean Lorrah is published by Pocket Books.
February
- 6 February - TNG: "A Matter Of Honor" airs.
- 13 February - TNG: "The Measure Of A Man" airs.
- 20 February - TNG: "The Dauphin" airs.
- Pocket TOS #44: Vulcan's Glory by D.C. Fontana is published by Pocket Books.
March
- 11 March - Anton Yelchin is born.
- 17 March - Merritt Butrick dies.
- 20 March - TNG: "Contagion" airs.
- 27 March - TNG: "The Royale" airs.
- Pocket TNG #5: Strike Zone by Peter David is published by Pocket Books.
April
- [[3 April : TNG: "Time Squared" airs.
- 15 April - The original draft version of TNG: "Yesterday's Enterprise", written by Trent Christopher Ganino, was printed.
- 23 April - Marc Daniels dies.
- [[24 April : TNG: "The Icarus Factor" airs.
- 29 April - Lucille Ball dies.
- Pocket TOS #45: Double, Double by Michael Jan Friedman is published by Pocket Books.
May
- 1 May - TNG: "Pen Pals" airs.
- 8 May - TNG: "Q Who" airs.
- 15 May - TNG: "Samaritan Snare" airs.
- 22 May - TNG: "Up The Long Ladder" airs.
- - Gerd Oswald dies.
- Pocket TNG #6: Power Hungry by Howard Weinstein is published by Pocket Books.
- Pocket TOS Star Trek V: The Final Frontier by J.M. Dillard is published by Pocket Books.
June
Star Trek V: The Final Frontier
- 9 June - Star Trek V: The Final Frontier, directed by William Shatner, opens in US theatres.
- 19 June - TNG: "Manhunt" airs.
- 29 June - TNG: "The Emissary" airs.
July
- 4 July - Vic Perrin dies.
- 10 July - TNG: "Peak Performance" airs.
- 17 July - TNG: "Shades of Gray" airs, concluding TNG Season 2. The episode is a clipshow, mostly due to budget limitations resulting from the previous year's Writer's Guild strike. The season is also 22 episodes rather than the typical 26, also due to the strike.
- Pocket TNG #7: Masks by John Vornholt is published by Pocket Books.
August
- TNG Season 3 begins production. Gates McFadden returns to the cast, thanks to a year-long letter-writing campaign and support from Patrick Stewart.
- 28 August - Madison Eginton is born.
- Pocket TNG #8: The Captains' Honor by David & Daniel Dvorkin is published by Pocket Books.
September
- 25 September - Star Trek: The Next Generation enters its third season, with the episode "Evolution".
October
- 2 October - TNG: "The Ensigns of Command" airs.
- 9 October - TNG: "The Survivors" airs.
- 16 October - TNG: "Who Watches The Watchers" airs.
- 18 October - Harvey Hart dies.
- 23 October - TNG: "The Bonding" airs.
- - Joshua Croughwell is born.
- 30 October - TNG: "Booby Trap" airs.
- Pocket TOS #46: The Cry of the Onlies by Judy Klass is published by Pocket Books.
- Pocket TOS The Lost Years by J.M. Dillard is published by Pocket Books.
November
- 6 November - TNG: "The Enemy" airs.
- 13 November - TNG: "The Price" airs.
- 18 November - Johnny Haymer dies.
- 20 November - TNG: "The Vengeance Factor" airs.
- Pocket TNG #9: A Call to Darkness by Michael Jan Friedman is published by Pocket Books.
December
- 15 December - Arnold Moss dies.
- Pocket TOS #47: The Kobayashi Maru by Julia Ecklar is published by Pocket Books.
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