- For information dealing with this year in the timeline of the fictional Star Trek universe, see 1990.
- 24 September 1990
- Star Trek: The Next Generation enters its fourth season, resolving the Borg cliffhanger with "The Best of Both Worlds, Part II."
- 19 November 1990
- Wil Wheaton's final episode as a regular TNG castmember, "Final Mission," airs.
|1989 productions|| Star Trek|
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