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- For information dealing with this year in the timeline of the fictional Star Trek universe, see 1988.
Production
January
- Week of 11 January
- TNG: "The Big Goodbye" airs.
- Week of 18 January
- TNG: "Datalore" airs.
- Week of 25 January
- TNG: "Angel One" airs.
February
- Week of 1 February
- TNG: "11001001" airs.
- Week of 8 February
- TNG: "Too Short a Season" airs.
- Week of 15 February
- TNG: "When The Bough Breaks" airs.
- Week of 22 February
- TNG: "Home Soil" airs.
March
- Week of 14 March
- TNG: "Coming of Age" airs.
- Week of 21 March
- TNG: "Heart of Glory" airs.
April
- Week of 11 April
- TNG: "The Arsenal of Freedom" airs.
- Week of 18 April
- TNG: "Symbiosis" airs.
- Week of 25 April
- TNG: "Skin of Evil" airs. Denise Crosby leaves the cast as Tasha Yar is killed off.
May
- Week of 2 May
- TNG: "We'll Always Have Paris" airs.
- Week of 9 May
- TNG: "Conspiracy" airs.
- Week of 16 May
- TNG: "The Neutral Zone" airs, concluding TNG Season 1.
Summer
- TNG Season 2 begins production, but is substantially delayed due to a Writer's Guild strike. Diana Muldaur joins the cast as Doctor Katherine Pulaski, replacing Gates McFadden as Beverly Crusher.
November
- Week of 21 November
- The second season of Star Trek: The Next Generation premieres with "The Child." The episode's late airdate is due to the Writer's Guild strike, and the script is recycled from an old Star Trek: Phase II story. Whoopi Goldberg makes the first of several recurring appearances as Guinan.
- Week of 28 November
- TNG: "Where Silence Has Lease" airs.
December
- Week of 5 December
- TNG: "Loud As A Whisper" airs.
- Week of 12 December
- TNG: "The Outrageous Okona" airs.
- December
- TNG enters a winter hiatus, continuing into 1989.
Other events
- 21 January
- Abraham Sofaer dies.
- 12 March
- Karen Steele dies.
- 4 May
- Ed Bakey dies.
- 1 July
- Tony Leader dies.
- 15 July
- Hana Hatae born.
- 11 October
- Morgan Farley dies.
- 28 November
- Scarlett Pomers born.
- 6 December
- Roy Orbison dies.
Merchandising
Novels
- January - Publication of "Final Frontier" (TOS #Giant#) by Diane Carey (Pocket Books)
- February - Publication of "The IDIC Epidemic" (TOS #38) by Jean Lorrah (Pocket Books)
- April - Publication of "Time for Yesterday" (TOS #39) by A.C. Crispin (Pocket Books)
- June - Publication of "Timetrap" (TOS #40) by David Dvorkin (Pocket Books)
- July - Publication of "Ghost Ship" (TNG #01) by Diane Carey (Pocket Books)
- August - Publication of "The Three-Minute Universe" (TOS #41) by Barbara Paul (Pocket Books)
- September - Publication of "Spock's World" (TOS #Giant#) by Diane Duane (Pocket Books)
- September - Publication of "The Peacekeepers" (TNG #02) by Gene DeWeese (Pocket Books)
- October - Publication of "Memory Prime" (TOS #42) by Garfield & Judith Reeves-Stevens (Pocket Books)
- November - Publication of "The Children of Hamlin" (TNG #03) by Carmen Carter (Pocket Books)
- December - Publication of "The Final Nexus" (TOS #43) by Gene DeWeese (Pocket Books)
Comics
- September - Publication of "Old Loyalties" (v1 #54) by Peter David, Gordon Purcell & Ricardo Villagran (DC Comics)
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