 | Tyrone Power als Leonard Vole |
 | Marlene Dietrich als Christine Vole |
 | Charles Laughton als Sir Wilfrid Robarts |
 | Elsa Lanchester als Miss Plimsoll |
 | John Williams als Brogan-Moore |
 | Henry Daniell als Mayhew |
 | Ian Wolfe als Carter |
 | Torin Thatcher als Mr. Myers |
 | Norma Varden als Emily Jane French |
 | Una O'Connor als Janet McKenzie |
 | Francis Compton als Judge |
 | Philip Tonge als Inspector Hearne |
 | Ruta Lee als Diana |
 | Patrick Aherne als Court Officer (uncredited) |
| Don Ames als Bar Patron (uncredited) |
| Walter Bacon als Bar Patron (uncredited) |
 | Eddie Baker als Courtroom Spectator (uncredited) |
| Benjie Bancroft als Courtroom Spectator (uncredited) |
| John Barton als Courtroom Spectator (uncredited) |
| Brandon Beach als Juror (uncredited) |
 | George Blagoi als Juror (uncredited) |
| Arline Bletcher als Courtroom Spectator (uncredited) |
| Danny Borzage als Courtroom Spectator (uncredited) |
| Tex Brodus als Courtroom Spectator (uncredited) |
| George Bruggeman als Courtroom Spectator (uncredited) |
 | George Calliga als Courtroom Spectator (uncredited) |
 | Steve Carruthers als Barrister (uncredited) |
| Albert Cavens als Courtroom Spectator (uncredited) |
| Oliver Cross als Courtroom Spectator (uncredited) |
| Harry Denny als Juror (uncredited) |
| Helen Dickson als Courtroom Spectator (uncredited) |
 | Minta Durfee als Courtroom Spectator (uncredited) |
 | Marjorie Eaton als Miss O'Brien (uncredited) |
 | Franklyn Farnum als Barrister (uncredited) |
 | Bess Flowers als Courtroom spectator (uncredited) |
 | Herschel Graham als Courtroom Spectator (uncredited) |
| Marion Gray |
| Stuart Hall als Courtroom Spectator (uncredited) |
| Art Howard als Courtroom Spectator (uncredited) |
| Michael Jeffers als Cafe Patron (uncredited) |
 | Colin Kenny als Juror (uncredited) |
 | Paul Kruger als Courtroom Spectator (uncredited) |
| Jeanne Lafayette als Courtroom Spectator (uncredited) |
 | Wilbur Mack als Courtroom Spectator (uncredited) |
 | Frank McLure als Court Officer (uncredited) |
 | Ottola Nesmith als Miss Johnson (uncredited) |
 | William H. O'Brien als Barrister (uncredited) |
 | J. Pat O'Malley als Shorts Salesman (uncredited) |
| George Pelling als Bit Part (uncredited) |
| Fred Rapport als Juror (uncredited) |
 | Jack Raine als Doctor (uncredited) |
| Waclaw Rekwart als Courtroom Spectator (uncredited) |
 | Leoda Richards als Hat Store Sales Clerk (uncredited) |
| John Roy als Courtroom Spectator (uncredited) |
| Edna Smith |
 | Scott Seaton als Courtroom Spectator (uncredited) |
 | Cap Somers als Courtroom Spectator (uncredited) |
 | Bert Stevens als Courtroom Spectator (uncredited) |
 | Jeffrey Sayre als Clerk at Old Bailey (uncredited) |
 | Norbert Schiller als Spotlight Operator in German Cafe (uncredited) |
 | Arthur Tovey als Courtroom Spectator (uncredited) |
 | Ben Wright als Barrister Reading Charges (uncredited) |
| Glen Walters als Courtroom Spectator (uncredited) |
| Lawrence B. Marcus | Adaptation |
| Harry Kurnitz | Screenplay |
| Billy Wilder | Director |
| Agatha Christie | Novel |
| Billy Wilder | Screenplay |
| Arthur Hornblow Jr. | Producer |
| Daniel Mandell | Editor |
| Fred Lau | Sound |
| John Franco | Script Supervisor |
| Joe King | Costume Design |
| Gustaf Norin | Makeup Artist |
| Emmett Emerson | Assistant Director |
| Wally Westmore | Makeup Artist |
| Edward Small | Executive Producer |
| Charles Gemora | Makeup Artist |
| Howard Bristol | Set Decoration |
| Lee Zavitz | Special Effects |
| Ben Hersh | Production Supervisor |
| Matty Malneck | Original Music Composer |
| Adele Parmenter | Costume Design |
| Madison S. Lacy | Still Photographer |
| Russell Harlan | Director of Photography |
| Edith Head | Costume Design |
| Alexandre Trauner | Art Direction |
| Harry Ray | Makeup Artist |
| Leonid Raab | Music Arranger |
| Stanley Detlie | Property Master |
| Ernest Gold | Conductor |
| Helene Parrish | Hairdresser |
| Nellie Manley | Hairdresser |
| Alexandre Trauner | Production Design |
| Agatha Christie | Story |
| Ray Sebastian | Makeup Artist |
| Frank Losee | Second Assistant Director |
| William Maybery | Casting |
| Doane Harrison | Production Assistant |
| Edward Small | Presenter |
| Basil Bleck | Technical Advisor |
| Noël Coward | Dialogue |
| Bert Steiner | Dialogue |
