| 2026-08-14 | 365th out of 365, in brief |
| 2026-04-23 | Science guy Bill |
| 2026-02-09 | Bill who says "Science rules!" in the intro to his TV show |
| 2025-09-27 | What comes before 1/1 |
| 2025-06-25 | Bill promoting science education |
| 2025-05-18 | 12/31 |
| 2025-04-26 | Countdown occasion, for short |
| 2025-01-14 | Scientific Bill |
| 2025-01-01 | 12/31 |
| 2024-11-04 | Dec. 31, in brief |
| 2024-10-01 | Bill ___, the Science Guy |
| 2024-03-17 | Occasion for fireworks: Abbr. |
| 2024-02-15 | Bill supporting public television |
| 2024-01-19 | Time to drop the ball, in brief |
| 2023-12-15 | Bill concerned with science communication |
| 2023-11-19 | It ends when 1/1 begins |
| 2023-08-18 | Bill of science |
| 2023-04-26 | Bill advocating for science |
| 2022-09-30 | Bill promoting science |
| 2022-05-12 | Celebration six days after Xmas |
| 2022-05-02 | December 31, for short |
| 2022-01-24 | Bill known as the "Science Guy" |
| 2021-09-16 | Dec. 31 |
| 2021-07-23 | Time for a countdown: Abbr. |
| 2021-06-22 | Nevada's largest county |
| 2021-01-01 | 12/31 |
| 2020-10-11 | "Science Guy" Bill |
| 2020-10-07 | Dec. 31 celebration |
| 2020-10-05 | Bill, the Science Guy |
| 2020-08-29 | Day when the ball drops: Abbr. |
| 2020-07-23 | TV's "Science Guy" |
| 2020-06-24 | December 31, in brief |
| 2020-05-19 | Science educator Bill |
| 2020-03-26 | "Bill ___ Saves the World" |
| 2020-01-25 | Dec. 31 |
| 2019-11-26 | "Science Guy" Bill |
| 2019-10-21 | 12/31, briefly |
| 2019-05-12 | Nevada's largest county by area |
| 2019-04-14 | Countdown time, for short |
| 2019-04-06 | Bill of the Planetary Society |
| 2019-03-17 | The Science Guy |
| 2019-02-25 | Netflix's "Bill ___ Saves the World" |
| 2018-08-21 | Bill ___, the Science Guy |
| 2018-08-02 | Dec. 31 |
| 2017-12-31 | December 31: Abbr. |
| 2017-08-16 | Bill ___, the Science Guy |
| 2017-06-26 | Bill who's a science expert |
| 2017-05-28 | C.E.O. of the Planetary Society starting in 2010 |
| 2017-04-11 | Bill who popularizes science |
| 2017-02-27 | "Science Guy" Bill |
| 2017-02-20 | Bill ___, the Science Guy |
| 2017-01-26 | Dec. 31 |
| 2016-11-23 | Former PBS host with a bow tie |
| 2016-10-11 | Bill ___, the Science Guy |
| 2016-09-09 | Host of the web series "Emoji Science" |
| 2016-04-21 | Nevada county with part of Death Valley National Monument |
| 2016-04-09 | Dec. 31 |
| 2015-12-21 | "Science Guy" Bill |
| 2015-08-12 | Bill in a bow tie |
| 2015-06-16 | Bill the "Science Guy" |
| 2015-06-14 | Science advocate Bill |
| 2015-05-14 | Largest county in Nevada |
| 2015-04-19 | Big name in antiscience debunking |
| 2014-10-20 | TV scientist Bill |
| 2014-10-16 | Science advocate with a bow tie |
| 2014-01-01 | Bill ___, the Science Guy |
| 2013-05-10 | Bill in a bow tie |
| 2012-12-10 | Science guy Bill |
| 2012-11-04 | Nevada county |
| 2012-10-15 | Bill ___, the Science Guy |
| 2012-06-11 | Bill the Science Guy |
| 2012-06-10 | TV scientist Bill |
| 2011-09-08 | Nevada county containing Yucca Mountain |
| 2011-05-17 | "Bill ___, the Science Guy" |
| 2010-05-30 | Scientist with multiple Emmys |
| 2009-11-15 | Nevada's largest county |
| 2009-09-07 | Bill the Science Guy |
| 2009-05-05 | Comedian Louis |
| 2008-12-20 | Frequent ad-libber on "The Steve Allen Show" |
| 2007-08-29 | Early TV comic Louis |
| 2007-07-29 | "The Eyes of ___" (public TV science show) |
| 2007-07-10 | Carrie of "Creepshow" |
| 2007-03-12 | Science guy Bill |
| 2006-08-16 | The Science Guy on TV |
| 2006-07-16 | Nevada county |
| 2006-05-23 | Bill ___, TV's Science Guy |
| 2006-05-03 | Nevada's largest county |
| 2005-02-10 | Nevada county |
| 2004-12-05 | Largest county of Nevada |
| 2004-09-02 | Bill ___, the Science Guy |
| 2004-04-19 | Science guy Bill |
| 2003-07-03 | Comic Louis |
| 2003-02-17 | Bill ___, TV's Science Guy |
| 2002-11-10 | Bill ___, the Science Guy |
| 2002-10-31 | TV's Science Guy |
| 2002-07-28 | "The Steve Allen Show" regular |
| 2001-04-22 | 1920's-40's North Dakota senator Gerald |
| 2001-01-11 | Actress Carrie |
| 2000-08-21 | Bill ___, the Science Guy |
| 2000-01-16 | Comic Louis |
| 2000-01-08 | "Baled Hay" humorist |
| 1999-04-19 | TV's "Science Guy" Bill |
| 1999-03-30 | Old-time humorist Bill |
| 1998-12-30 | Bill, the Science Guy |
| 1998-11-28 | "The Steve Allen Show" regular |
| 1998-10-20 | "The Science Guy" on TV |
| 1998-08-04 | "Bill ___, The Science Guy" |
| 1998-06-18 | TV's "Science Guy" |
| 1998-03-31 | Bill ___, the Science Guy |
| 1997-12-22 | Actress Carrie |
| 1997-04-07 | Old TV comedian Louis |
| 1997-01-16 | Comic Louis |
| 1996-09-29 | Nevada county |
| 1995-11-03 | Historian Russel ____ |
| 1995-07-16 | Pulitzer author Russel |
| 1995-04-18 | Comedian Louis |
| 1995-02-02 | "Steve Allen Show" regular |
| 1995-01-29 | Humorist Bill |
| 1994-10-02 | Comic author Bill |
| 1994-09-29 | Laugh maker Louis |
| 1994-07-05 | TV comic Louis |
| 1994-05-04 | Actress Carrie |
| 1994-04-15 | Carrie married to Cavett |
| 1994-02-25 | "Steve Allen Show" veteran |