| Person | Type | Job | Role(s) |
|---|---|---|---|
 Abraham Grossman | Crew | Art | Art Direction |
 Arthur Conan Doyle | Crew | Writing | Story, Novel |
Bernard B. Brown | Crew | Sound | Sound Director |
Carmen Dirigo | Crew | Costume & Make-Up | Hairstylist |
Frank Gruber | Crew | Writing | Screenplay |
Howard Benedict | Crew | Production | Executive Producer |
Jack A. Bolger, Jr. | Crew | Sound | Sound Engineer |
 Jack Pierce | Crew | Costume & Make-Up | Makeup Department Head |
John B. Goodman | Crew | Art | Art Direction |
Maury Gertsman | Crew | Camera | Director of Photography |
Melville Shyer | Crew | Directing | Assistant Director |
Milton Rosen | Crew | Sound | Music Director |
 Roy William Neill | Crew | Directing | Director, Producer |
Russell A. Gausman | Crew | Art | Set Decoration |
Saul A. Goodkind | Crew | Editing | Editor |
Vera West | Crew | Costume & Make-Up | Costume Design |
Carl Lawrence | Crew | Art | Set Decoration |
Raymond Kessler | Crew | Crew | Dialogue Coach |
 Alan Mowbray | Cast | Actor | Major Duncan-Bleek |
 Basil Rathbone | Cast | Actor | Sherlock Holmes |
 Billy Bevan | Cast | Actor | Conductor Taking Tickets |
Boyd Davis | Cast | Actor | "Inspector MacDonald" (uncredited) |
 C. Aubrey Smith | Cast | Actor | Elderly gentleman on train station (uncredited) |
 Dennis Hoey | Cast | Actor | Inspector Lestrade |
 Frederick Worlock | Cast | Actor | Prof. William Kilbane |
Geoffrey Steele | Cast | Actor | Roland Carstairs |
 Gerald Hamer | Cast | Actor | Alf Shallcross (uncredited) |
 Harry Cording | Cast | Actor | Mock the Undertaker (uncredited) |
 Janet Murdoch | Cast | Actress | Mrs. Shallcross (uncredited) |
 Leyland Hodgson | Cast | Actor | Senior Conductor (uncredited) |
 Mary Forbes | Cast | Actress | Lady Margaret Carstairs |
 Nigel Bruce | Cast | Actor | Dr. John H. Watson |
 Renee Godfrey | Cast | Actress | Vivian Vedder |
 Skelton Knaggs | Cast | Actor | Sands - Moran's Accomplice |
Charles Knight | Cast | Baggage Car Guard (uncredited) | |
Bobby Wissler | Cast | Mock Jr. (uncredited) | |
Gilbert Allen | Cast | Dining Car Steward (uncredited) | |
| Person | Type | Job | Role(s) |
