The Mysterious Miss X (1939) — Cast
Cast
| Pierre Watkin | Norther Winslow |
| Frank M. Thomas | District Attorney |
| Chick Chandler | Scooter |
| Lynne Roberts | Julie |
| Mabel Todd | Botts |
| Regis Toomey | Unity Webster |
| Dorothy Tree | Jenn Platt |
| Walter Sande | Cab Stealer |
| Donald Douglas | Fredericks |
| Wade Boteler | McDougal |
| Harry Strang | Freeway Driver |
| Michael Whalen | Neville |
| Eddie Acuff | Policeman |
| Harlan Briggs | Charlie |
| Bruce MacFarlane | Policeman |
| George Montgomery | Policeman |
| Richard Cramer | Patrice (Julie's Husband) |
| Eddie Fetherston | Yamomoto's Henchman |
| Alan Ladd | Yamomoto's Henchman |
| Frank O'Connor | Policeman |
| Broderick O'Farrell | Policeman |
Crew
| Olive Cooper | Screenplay |
| Gus Meins | Director |
| George Worthing Yates | Story |