Historical clue formulations

• Lead agent on "NCIS" — 2020-11-21
• Barry, Robin and Maurice of the Bee Gees — 2015-10-19
• Terri with the 1980 country hit "Somebody's Knockin'" — 2013-01-31
• Longtime Redskins coach Joe — 2012-03-25
• Pro Football Hall of Fame coach Joe — 2011-04-23
• Brothers who sang "Stayin' Alive" — 2010-02-26
• The Bee Gees brothers — 1997-10-06
• The Bee Gees — 1997-01-23
• Former Redskins coach Joe — 1996-05-22