A California commercial pilot sees a telecast in London of an interview with Sir Mark Lodden at his home. The Canadian is convinced that the baronet is a fraud, and he is actually a look-alike actor named Frank Welney.
| Directing | Anthony Asquith | Director |
| Production | Irene Howard | Casting |
| Editing | Frank Clarke | Editor |
| Crew | Benjamin Frankel | Compositor |
| Writing | Karl Tunberg | Screenplay |
| Art | Paul Sheriff | Art Direction |
| Writing | Anatole de Grunwald | Screenplay |
| Production | Anatole de Grunwald | Producer |
| Production | Pierre Rouve | Associate Producer |
| Art | Maurice Fowler | Set Dresser |
| Costume & Make-Up | Bill Lodge | Makeup Artist |
| Sound | Benjamin Frankel | Music |
| Sound | J.B. Smith | Sound Mixer |
| Costume & Make-Up | Joan Johnstone | Hairstylist |
| Sound | Robert Carrick | Sound Editor |
| Sound | Gerry Turner | Sound Recordist |
| Production | Roy Parkinson | Executive In Charge Of Production |
| Directing | David Middlemas | Assistant Director |
| Visual Effects | Tom Howard | Visual Effects |
| Sound | A.W. Watkins | Sound Recordist |
| Costume & Make-Up | Christian Dior | Costume Design |
| Writing | Edward Wooll | Original Story |
| Camera | Robert Krasker | Director of Photography |
