Historical clue formulations

• Sci-fi star who hosted the documentary series "In Search of ..." — 2019-08-17
• "I Am Not Spock" memoirist ... who then wrote "I Am Spock" 20 years later — 2018-03-22
• Leonard who played Mr. Spock — 2013-09-16
• Player of a stoic crew member — 2011-05-27
• Player of a logical crew member — 2010-05-22
• "I Am Spock" autobiographer — 2009-02-19
• Host of TV's "In Search Of …" — 2006-08-27
• "In Search Of …" host — 2004-12-26
• Mr. Spock portrayer — 2000-07-10
• Vulcan portrayer — 1999-05-06
• Trekkie idol — 1997-03-27