Historical clue formulations

• "We come in peace" speakers, in a sci-fi trope — 2026-07-14
• Extraterrestrials — 2026-02-23
• Sci-fi sequel of 1986 — 2025-12-14
• U.F.O. crew — 2023-12-26
• Weaver's work? — 2023-10-07
• Many characters in "Guardians of the Galaxy" — 2022-07-12
• Ones potentially contacted in "first contact" — 2022-04-12
• Their existence is debatable — 2021-10-17
• 1986 sci-fi sequel set in deep space — 2021-01-18
• 1986 sci-fi film sequel — 2020-12-04
• "Futurama" figures — 2019-08-12
• Ones supposedly eligible for, but never yet seen in, the Miss Universe pageant — 2019-03-23
• Contents of a saucer, maybe — 2018-05-27
• Space race? — 2018-01-27
• Subjects of some conspiracy theories — 2017-12-01
• Xenophobes' fear — 2017-05-10
• One of the eggs used in this 1986 film is now exhibited at the Smithsonian — 2016-11-17
• Time Lords on "Doctor Who," e.g. — 2014-12-12
• Many Astounding Stories cover subjects — 2014-08-20
• Xenophobes' fear — 2012-11-28
• Figures in TV's "V" — 2012-08-19
• Hit film directed by James Cameron — 2012-01-13
• 1986 film shot partly in a decommissioned power plant — 2011-09-04
• Martians and Venusians — 2011-06-27
• "V" extras — 2010-07-15
• "The X-Files" figures — 2010-05-11
• Vulcans and Romulans — 2009-05-27
• 1986 sci-fi sequel — 2008-06-25
• One line at passport control — 2006-11-19
• Saucer contents — 2006-06-09
• Ones who are worlds apart — 2005-08-14
• Saucers may hold them — 2004-09-19
• 24-Across and others — 2003-04-12
• Border patrol concerns — 2002-09-11
• 29-Across fliers — 2002-08-11
• 1986 sci-fi sequel — 2002-04-01
• Ones with green cards — 2002-04-01
• They upset xenophobes — 2001-12-09
• U.F.O. crew — 2000-10-30
• Bigheaded ones? — 2000-08-26
• Who "they" are in the movie "They Live" — 2000-08-05
• Klingons and Vulcans — 2000-06-20
• Border patrol concern — 2000-05-16
• They're out of this world — 2000-04-02
• Martians and such — 2000-02-28
• Roswell visitors? — 1999-11-21
• UFO crew — 1999-01-03
• The Coneheads, e.g. — 1998-11-22
• U.F.O. crew — 1998-06-24
• Frequent 24-Down subject — 1997-11-28