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Lionel Alfred William Atwill(March 1, 1885 – April 22, 1946) was an English-American stage and screen actor, best known for numerous leading roles in horror movies in 1930s. Lionel Atwill can be seen using the following weapons in the following films:
| Character | Firearm | Notes |
|---|---|---|
| Professor Moriarty | Webley Bulldog | - |
| Professor Moriarty | Iver Johnson Bulldog | - |
| Professor Moriarty | Compact top-break revolver | Only on a promotional still |