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- For information dealing with this year in the timeline of the fictional Star Trek universe, see 1989.
Star Trek V: The Final Frontier
Production
January
- Week of 9 January
- TNG: "Loud As A Whisper" airs.
- Week of 23 January
- TNG: "The Schizoid Man" airs.
- Week of 30 January
- TNG: "Unnatural Selection" airs.
February
- Week of 6 February
- TNG: "A Matter of Honor" airs.
- Week of 13 February
- TNG: "The Measure of a Man" airs.
- Week of 20 February
- TNG: "The Dauphin" airs.
March
- Week of 20 March
- TNG: "Contagion" airs.
- Week of 27 March
- TNG: "The Royale" airs.
April
- Week of 3 April
- TNG: "Time Squared" airs.
- Week of 24 April
- TNG: "The Icarus Factor" airs.
May
- May
- Week of 1 May
- TNG: "Pen Pals".
- Week of 8 May
- TNG: "Q Who".
- Week of 15 May
- TNG: "Samaritan Snare".
- Week of 22 May
- TNG: "Up the Long Ladder".
June
- 9 June
- Star Trek V: The Final Frontier, directed by William Shatner, opens in US theatres.
- Week of 19 June
- TNG: "Manhunt" airs.
- Week of 29 June
- TNG: "The Emissary" airs.
July
- Week of 10 July
- TNG: "Peak Performance" airs.
- Week of 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.
Summer
- Late summer
- TNG Season 3 begins production. Gates McFadden returns to the cast, thanks to a yearlong letter-writing campaign and support from Patrick Stewart.
September
- Week of 25 September
- Star Trek: The Next Generation enters its third season, with the episode "Evolution."
October
- Week of 2 October
- TNG: "The Ensigns of Command" airs.
- Week of 9 October
- TNG: "The Survivors" airs.
- Week of 16 October
- TNG: "Who Watches the Watchers?" airs.
- Week of 23 October
- TNG: "The Bonding" airs.
- Week of 30 October
- TNG: "Booby Trap" airs.
November
- Week of 6 November
- TNG: "The Enemy" airs.
- Week of 13 November
- TNG: "The Price" airs.
- Week of 20 November
- TNG: "The Vengeance Factor" airs.
December
- December
- TNG goes on winter hiatus, continuing into 1990.
Other events
- 17 March
- Merritt Butrick dies.
- 23 April
- Marc Daniels dies.
- 29 April
- Lucille Ball dies.
- 22 May
- Gerd Oswald dies.
- 4 July
- Vic Perrin dies.
- 28 August
- Madison Eginton is born.
- 18 October
- Harvey Hart dies.
- 18 November
- Johnny Haymer dies.
- 15 December
- Arnold Moss dies.
Merchandising
Novels
- January - Publication of "Survivors" (TNG #04) by Jean Lorrah (Pocket Books)
- February - Publication of "Vulcan's Glory" (TOS #44) by D.C. Fontana (Pocket Books
- March - Publication of "Strike Zone" (TNG #05) by Peter David (Pocket Books)
- April - Publication of "Double, Double" (TOS #45) by Michael Jan Friedman (Pocket Books)
- May - Publication of "Power Hungry" (TNG #06) by Howard Weinstein (Pocket Books)
- May - Publication of "Star Trek V: The Final Frontier" (TOS) by J.M. Dillard (Pocket Books)
- July - Publication of "Masks" (TNG #07) by John Vornholt (Pocket Books)
- August - Publication of "The Captains' Honor" (TNG #08) by David & Daniel Dvorkin (Pocket Books)
- October - Publication of "The Cry of the Onlies" (TOS #46) by Judy Klass (Pocket Books)
- October - Publication of "The Lost Years" (TOS #Giant#) by J.M. Dillard (Pocket Books)
- November - Publication of "A Call to Darkness" (TNG #09) by Michael Jan Friedman (Pocket Books)
- December - Publication of "The Kobayashi Maru" (TOS #47) by Julia Ecklar (Pocket Books)
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