Historical clue formulations

• Only character shown in the final 30 minutes of "2001: A Space Odyssey" — 2025-02-20
• Half of a noted arcade pair — 2024-11-29
• Protagonist in "2001: A Space Odyssey" — 2024-03-10
• Rocker Grohl — 2023-03-17
• "I'm sorry, ___, I'm afraid I can't do that" (line from HAL in "2001") — 2023-01-29
• Singer/songwriter Matthews — 2018-04-19
• "Affirmative, ___, I read you" (line in "2001: A Space Odyssey") — 2016-08-17
• Actor Franco of "Now You See Me" — 2014-05-02
• Letterman of late-night — 2013-12-02
• Humorist Barry — 2013-02-13
• Thwarter of HAL — 2012-11-25
• Humorist Barry — 2012-06-12
• Brubeck of jazz — 2012-04-18
• Writer Eggers — 2011-04-02
• "Late Show" host, colloquially — 2010-09-09
• Early TV host Garroway — 2009-05-08
• Comic Chappelle — 2007-06-19
• Comedian Chappelle — 2006-05-13
• Host Letterman — 2005-04-18
• Starsky of "Starsky and Hutch" — 2003-05-08
• Pulitzer-winning humorist Barry — 2001-11-19
• Noted Barry — 2001-10-20
• Letterman of late-night — 2001-10-01
• Pianist Brubeck — 2001-08-08
• 1993 Kevin Kline movie — 2001-06-13
• Singer Matthews — 2000-12-17
• 1993 film in which Kevin Kline played the president — 2000-08-29
• 1993 Kevin Kline title role — 1999-10-16
• Jay's competition — 1999-08-24
• Late-night name — 1998-12-23
• TV's Letterman — 1998-04-20
• 1993 Kevin Kline comedy — 1997-08-03
• Garroway of early TV — 1997-06-10
• "___ Barry Turns 40" (1990 best seller) — 1997-03-05
• 1993 Kevin Kline movie — 1994-03-26
• Garroway of '50s TV — 1994-01-13