 | Ray Milland als Stephen Neale |
 | Marjorie Reynolds als Carla Hilfe |
 | Carl Esmond als Willi Hilfe |
 | Hillary Brooke als Mrs. Bellane #2, spiritualist |
 | Percy Waram als Inspector Prentice |
 | Dan Duryea als Cost aka Travers the tailor |
 | Alan Napier als Dr. Forrester |
 | Erskine Sanford als George Rennit, private investigator |
 | Harry Allen als Tailor's Delivery Man (uncredited) |
| Frank Baker als Scotland Yard Man (uncredited) |
| Vangie Beilby als Old Lady at Charity Bazaar (uncredited) |
| Evelyn Beresford als Fat Lady at Charity Bazaar (uncredited) |
 | Aminta Dyne als Mrs. Bellane #1 - fortune teller (uncredited) |
 | Byron Foulger als Mr. Newby (uncredited) |
 | Colin Kenny als Scotland Yard Man (uncredited) |
| Connie Leon als lady Purchaser of Cake (uncredited) |
 | Ottola Nesmith als Woman at Admission Gate (uncredited) |
| Victor Young | Original Music Composer |
| Archie Marshek | Editor |
| Seton I. Miller | Screenplay |
| Hans Dreier | Art Direction |
| Graham Greene | Novel |
| Henry Sharp | Director of Photography |
| Edith Head | Costume Design |
| Hal Pereira | Art Direction |
| Wally Westmore | Makeup Artist |
| Buddy G. DeSylva | Executive Producer |
| Bertram C. Granger | Set Decoration |
| Fritz Lang | Director |
| Miklós Rózsa | Additional Music |
| Don Johnson | Sound Recordist |
| W.C. Smith | Sound Recordist |
| Seton I. Miller | Associate Producer |
