Historical clue formulations

• "Star Trek" spinoff series: Abbr. — 2019-07-23
• "Star Trek: ___" (syndicated series of the '80s-'90s) — 2019-03-13
• "Star Trek" sequel, briefly — 2018-12-05
• Sci-fi TV series before "DS9" — 2017-11-24
• 1987-94 "Star Trek" series, briefly — 2017-04-05
• "Star Trek" series, to fans — 2007-05-13
• "Star Trek: ___" — 2007-05-06
• "Star Trek" series preceding "Voyager," for short — 2006-11-25
• One of the "Star Trek" series, to fans — 2004-05-09