| 100% | STEPHEN | 7 | ___ Hawking, theoretical physicist |
| 76% | DIRAC | 5 | English theoretical physicist |
| 74% | DIRAC | 5 | Theoretical physicist |
| 72% | DIRAC | 5 | Theoretical physicist Paul |
| 72% | ALBERT | 6 | ___ Einstein, theoretical physicist |
| 72% | ERWIN | 5 | Theoretical physicist Schrödinger |
| 72% | PAULI | 5 | Theoretical physicist Wolfgang |
| 71% | STEPHEN | 7 | Hawking, physicist |
| 67% | HAWKING | 7 | Theoretical physicist depicted in a movie |
| 67% | DIRAC | 5 | English theoretical physicist Paul |
| 67% | STEPHEN | 7 | Physicist ___ Hawking |
| 65% | ENRICO | 6 | Theoretical physicist Fermi who was not, himself, theoretical |
| 58% | SHELDON | 7 | Theoretical physicist Cooper played by Jim Parsons on "The Big Bang Theory" |
| 54% | HAWKING | 7 | 2004 TV film based on the life of English theoretical physicist Stephen |
| 53% | HAWKING | 7 | Stephen —, British theoretical physicist whose books include The Nature of Space and Time |
| 53% | HAWKING | 7 | Stephen ___, English theoretical physicist and cosmologist who studied physics at University College, Oxford |
| 53% | PAUL | 4 | ___ Dirac, English theoretical physicist known for his contributions to quantum mechanics and electrodynamics |
| 53% | FEYNMAN | 7 | Richard ___, theoretical physicist and Nobel Laureate who popularized physics through books and lectures |
| 49% | STEPHENHAWKING | 14 | Real-life theoretical physicist portrayed by Eddie Redmayne in "The Theory of Everything": 2 wds. |
| 48% | HAWKING | 7 | Theoretical physicist Stephen, whose life is portrayed by Eddie Redmayne in the 2014 film "The Theory of Everything" |
| 48% | KAKU | 4 | Michio ___, theoretical physicist and New York Times best-selling author who has hosted several TV specials |
| 46% | UNIVERSEIN | 10 | "The ___ a Nutshell," 2001 book about theoretical physics by Stephen Hawking: 2 wds. |
| 43% | ALBERTEINSTEIN | 14 | Nobel Prize-winning theoretical physicist profiled by 54-Across in a biography subtitled "His Life and Universe" (2 wds.) |
| 41% | STEPHEN | 7 | With 47-Across, theoretical physicist and author of 20-Across/28-Across/41-Across who passed away March 14, 2018 |
| 40% | FALCONRY | 8 | Hawking |
| 39% | AMPERE | 6 | Noted French physicist |
| 39% | LAPP | 4 | Manhattan Project physicist |
| 39% | AMPERE | 6 | Eponymous French physicist |
| 39% | FERMI | 5 | Manhattan Project physicist |
| 39% | GAUSS | 5 | Eponymous German physicist |