Historical clue formulations

• Head block? — 2026-03-25
• Never mind? — 2026-02-01
• Ironic-sounding plot device in "Total Recall" — 2022-09-09
• Plot device that prompts a protagonist to piece things together — 2020-09-11
• Overused plot device in soaps — 2014-02-25
• "The Bourne Identity" plot device — 2012-08-17
• Dory's affliction in "Finding Nemo" — 2011-01-19
• Overused soap opera plot device — 2009-09-03
• Result of butting heads? — 2009-05-14
• Calling up trouble? — 2006-09-01
• Occasional soap opera plot feature — 2004-03-14
• Common soap opera affliction — 2003-01-05
• Knock-on-the-noggin consequence — 2002-01-02
• Condition sometimes treated by hypnosis — 1999-11-21
• Courtroom alibi, perhaps — 1997-08-22
• Reason for an identity crisis — 1996-09-29
• Result of a head injury, maybe — 1996-05-09
• More than forgetfulness — 1995-03-06
• Serious lapse — 1994-06-25