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2004
January
- 17 January - Albert Henderson and Noble Willingham die.
- 25 January - Jerry Greenwood dies.
- 26 January - Cameron McCulloch dies.
- 27 January - Star Trek VI: The Undiscovered Country (Special Edition) is released on Region 1 DVD.
February
- 1 February - Pocket TNG novel A Time to Be Born by John Vornholt is published by Pocket Books.
- 12 February - Harriet Leider dies.
- 13 February - Jim Rugg dies.
- 16 February - Bill Oakley dies.
- 17 February - Samuel Matlovsky dies.
- 24 February -
- Star Trek: Voyager: The Complete First Season is released on Region 1 DVD.
- Pocket TNG novel A Time to Die by John Vornholt is published by Pocket Books.
March
- 3 March - Cecily Adams dies.
- 7 March - Paul Winfield dies.
- 30 March - Pocket TNG novel A Time to Sow by Dayton Ward and Kevin Dilmore is published by Pocket Books.
April
- 1 April - Ward Botsford dies.
- 13 April - Shirley Maiewski dies.
- 27 April - Pocket TNG novel A Time to Harvest by Dayton Ward and Kevin Dilmore is published by Pocket Books.
May
- 12 May - Jim Goodwin dies.
- 13 May - Betty Matsushita dies.
- 18 May - Star Trek: Voyager: The Complete Second Season is released on Region 1 DVD.
- 25 May - Pocket TNG novel A Time to Love by Robert Greenberger is published by Pocket Books.
June
- 4 June - Charles Correll dies.
- 29 June - Pocket TNG novel A Time to Hate by Robert Greenberger is published by Pocket Books.
July
- 6 July -
- Jimmie F. Skaggs dies.
- Star Trek: Voyager: The Complete Third Season is released on Region 1 DVD.
- 21 July - Jerry Goldsmith (composer of five Star Trek films as well as the title themes for Star Trek: The Next Generation and Star Trek: Voyager) dies of prostate cancer.
- 27 July - Pocket TNG novel A Time to Kill by David Mack is published by Pocket Books.
- News is published that James Doohan has been diagnosed with Alzheimer's disease.
August
- 3 August - Star Trek: The Next Generation - Jean-Luc Picard Collection is released on Region 1 DVD.
- 28 August - Robert Lewin dies.
- 30 August - James Doohan receives a star on the Hollywood Walk of Fame, his final planned public appearance.
- 31 August -
- Star Trek: The Original Series: The Complete First Season is released on Region 1 DVD. The sets replace the single, two episode per disc releases of 1999 and 2000.
- Pocket TNG novel A Time to Heal by David Mack is published by Pocket Books.
September
- 7 September - Star Trek Generations (Special Edition) is scheduled for release on Region 1 DVD. It is delayed three weeks when an error stating trailers would be included on the bonus disc is identified on the packaging.
- 28 September -
- Star Trek: Voyager: The Complete Fourth Season is released on Region 1 DVD.
- Star Trek Generations (Special Edition) is finally released on Region 1 DVD.
- 29 September - Shimon Wincelberg dies.
October
- 8 October - ENT Season 4 premieres with ENT: "Storm Front".
- 25 October - Burt "Skip" Burnam dies.
- 28 October - Charles F. Wheeler dies.
November
- 2 November - Star Trek: The Original Series: The Complete Second Season is released on Region 1 DVD.
- 3 November - Dave Perna dies.
- 6 November - Elizabeth Rogers dies.
- 9 November - Star Trek: Voyager: The Complete Fifth Season is released on Region 1 DVD.
- 12 November - Walter Irwin dies.
- 16 November - Christopher T. Gerrity dies.
- 22 November - Danny McCauley dies.
December
- 7 December - Star Trek: Voyager: The Complete Sixth Season is released on Region 1 DVD.
- 13 December - Ben Slack dies.
- 14 December - Star Trek: The Original Series: The Complete Third Season is released on Region 1 DVD.
- 21 December - Star Trek: Voyager: The Complete Seventh Season is released on Region 1 DVD.
- 23 December - Frank Orsatti dies.
- 29 December - William Boyett dies.
- 30 December - Milt Tarver dies.
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