Historical clue formulations

• "Star Trek" villain played by Ricardo Montalbán — 2026-02-21
• ___ Academy, source of free online courses — 2025-04-08
• ___ Academy, online education nonprofit — 2024-08-06
• Royal title of old — 2022-10-29
• ___ Academy, organization for self-paced education online — 2022-01-14
• Sadiq ___, London mayor beginning in 2016 — 2019-12-06
• Title that translates as "lord" — 2018-08-29
• Sadiq ___, London mayor elected in 2016 — 2017-11-03
• Wrathful "Star Trek" villain — 2017-09-20
• ___ Academy (means of online education) — 2016-07-24
• Tribal title — 2016-04-08
• Title villain of a "Star Trek" film — 2015-09-03
• Head of a Tatar group — 2015-01-18
• "Star Trek II" villain — 2012-01-29
• Villainous role for Montalbán — 2011-11-27
• Title that's a homophone of 13-Down — 2011-10-18
• "Star Trek" villain — 2011-04-11
• Kirk's foe in a "Star Trek" sequel — 2010-12-22
• Genghis ___ — 2010-08-24
• Tribal chief — 2008-01-13
• Old Asian ruler — 2007-04-25
• Wrathful foe of Captain Kirk — 2006-07-11
• Genghis ___ — 2005-11-16
• Top Tatar — 2004-12-03
• Mongol title — 2004-05-24
• Marco Polo associate — 2003-02-01
• Top Tatar — 2001-12-21
• Wrathful one in a "Star Trek" sequel — 2000-11-05
• Hayworth's royal hubby — 1998-09-17
• Top Tatar — 1998-04-21
• Tribal chief — 1997-08-01
• Tatar ruler — 1995-07-19
• Turkish for "ruler" — 1994-02-18
• Tatar chief — 1993-12-22