| Person | Type | Job | Role(s) |
|---|---|---|---|
 Bob Lawrance | Crew | Costume & Make-Up | Makeup Artist |
George Burgess | Crew | Sound | Sound Recordist |
 Georges Auric | Crew | Sound | Original Music Composer |
Gordon Hales | Crew | Editing | Editor |
Harry Waxman | Crew | Camera | Director of Photography |
 John Hawkesworth | Crew | Art | Art Direction |
Julia Squire | Crew | Costume & Make-Up | Costume Designer |
Leigh Aman | Crew | Production | Production Manager |
Maurice Rapf | Crew | Writing | Screenplay |
Muir Mathieson | Crew | Sound | Conductor |
Paul Finder Moss | Crew | Production | Producer |
 Robert Hamer | Crew | Directing | Director, Screenplay |
Thelma Schnee | Crew | Writing | Screenplay, Adaptation |
Vivian Cox | Crew | Production | Associate Producer |
Max Varnel | Crew | Directing | Assistant Director |
 Gilbert Keith Chesterton | Crew | Writing | Story |
Leonard Bulkley | Crew | Sound | Sound Recordist |
Phyllis Crocker | Crew | Directing | Continuity |
Pauline Trent | Crew | Costume & Make-Up | Hairstylist |
James Bawden | Crew | Camera | Camera Operator |
 Alec Guinness | Cast | Actor | Father Brown |
 Aubrey Woods | Cast | Actor | Charlie |
 Austin Trevor | Cast | Actor | The Herald |
 Bernard Lee | Cast | Actor | Inspector Valentine |
 Cecil Parker | Cast | Actor | The Bishop |
Daniel Clérice | Cast | Garagiste | |
 Dino Galvani | Cast | Actor | Italian Professor |
 Ernest Clark | Cast | Actor | Bishop's Secretary |
 Ernest Thesiger | Cast | Actor | The Vicomte |
 Everley Gregg | Cast | Actress | Governess |
Guido Lorraine | Cast | Actor | Café Patron |
 Gérard Oury | Cast | Actor | Inspector Dubois |
Hugh Dempster | Cast | Actor | Man in Bowler Hat |
Hugo Schuster | Cast | Actor | Optician |
 Jack McNaughton | Cast | Actor | Railway Guard |
 Jim Gérald | Cast | Actor | French Stationmaster |
 Joan Greenwood | Cast | Actress | Lady Warren |
 John Horsley | Cast | Actor | Inspector Wilkins |
 John Salew | Cast | Actor | Station sergeant |
Launce Maraschal | Cast | Actor | Texan Millionaire |
 Marne Maitland | Cast | Actor | Maharajah |
 Noel Howlett | Cast | Actor | Auctioneer |
 Peter Finch | Cast | Actor | Gustave Flambeau |
 Sam Kydd | Cast | Actor | Scotland Yard sergeant |
 Sid James | Cast | Actor | Bert Parkinson |
 Eugene Deckers | Cast | Actor | French Cavalry Officer |
Diana Van Proosdy | Cast | Waitress | |
Betty Baskcomb | Cast | Actress | French Widow |
| Person | Type | Job | Role(s) |
