Dan Fredenburgh
From Internet Movie Firearms Database - Guns in Movies, TV and Video Games

Dan Fredenburgh (at the left) holds a Single Action Army as James Trewlove (in female disguise) in Father Brown (2013).
Dan Fredenburgh can be seen using the following weapons in the following television series:
Television
Gun | Character | Title | Note | Date |
---|---|---|---|---|
Bruni Olympic 6 | James Trewlove | Father Brown | "The Flying Stars" (S01E02) | 2013 |
Single Action Army | James Trewlove | Father Brown | "The Flying Stars" (S01E02) | 2013 |