The Mystery of Mr. X (1934) — Cast
Cast
| Ralph Forbes | Christopher |
| Leonard Mudie | X |
| Lewis Stone | Connor |
| Ivan F. Simpson | Gregg Hutchinson |
| Forrester Harvey | Joe |
| Robert Montgomery | Nicholas |
| Henry Stephenson | Sir Te |
| Elizabeth Allan | Jane |
Crew
| Douglas Shearer | Sound Director |
| Merrill Pye | Art Direction |
| Oliver T. Marsh | Director of Photography |
| Monckton Hoffe | Additional Dialogue |
| Philip MacDonald | Novel |
| Hugh Wynn | Editor |
| Lawrence Weingarten | Producer |
| Edgar Selwyn | Director |
| William Axt | Music |
| Adrian | Costume Design |
| Philip MacDonald | Adaptation |
| Howard Emmett Rogers | Screenplay |