| AERONAUTICS | The science, theory and operation of flying machines |
| FLATEARTH | Anti-science theory of cosmography |
| AVIATION | Science of flying machines (8) |
| DAVINCI | Early designer of flying machines |
| AERON | Office chair known as America's best-selling chair or study of flying machines for short |
| JOHNNYGALECKI | Leonard Hofstadter in the TV sitcom The Big Bang Theory and David Healy in the TV sitcom Roseanne are roles played by this US actor, whose films include Hancock and Vanilla Sky (6,7) |
| RHETORIC | The theory and practice of eloquence as a means of persuasion (8) |
| EBENEZERPROUT | Which English musicologist and composer's first of many theory books was Harmony, its Theory and Pra |
| NEUMANN | Von -; Inventor of game theory and the MANIAC computer who was involved in the nuclear weapon doctrine MAD (7) |
| ABEL | Mathematician who pioneered group theory and proved that there are no algebraic solutions to the general quintic equation; or, the shepherd brother of Cain (4) |
| TYKE | Yorkshireman displaying the limits of theory and knowledge |
| BIALIK | Mayim _, star of The Big Bang Theory and Blossom (6) |
| RAUCH | Melissa of Big Bang Theory and the new Night Court |
| ARITHMETIC | Branch of mathematics that deals with the study of numbers and operations on them (10) |
| CODENAMES | Manhattan Project and Operation Overlord |
| DROOP | Medic before round and operation gets to show tiredness? (5) |
| PLAYSTHEGAME | Acts conventionally at The Abbey with a fair amount of theory and plot (5,3,4) |
| LORRE | Chuck who co-created "The Big Bang Theory" and "Two and a Half Men" |
| BOHR | Niels -; scientist awarded a Nobel Prize for contributions towards the understanding of quantum theory and atomic structure (4) |
| JIM | The Big Bang Theory and Hidden Figures actor, ___ Parsons (3) |
