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The Mysterious Mr. M is a 1946 Universal Pictures movie serial, the 137th and last serial produced by Universal.
Original Release
07/23/1946
US Release
07/23/1946
Cast
| Name | Character |
|---|
| Edmund MacDonald | Anthony Waldron |
| Pamela Blake | Shirley Clinton |
| Danny Morton | Derek Lamont |
| Virginia Brissac | Cornelia Waldron |
| Joseph Crehan | Police Chief Dan Blair / Dan Blair |
| Jack Ingram | William Shrag |
| Dennis Moore | Agent Grant Farrell |
| Richard Martin | Detective Lt. Kirby Walsh |
| Byron Foulger | Wetherby |
| Jane Randolph | Marina Lamont |
Directors
Lewis D. Collins, Vernon Keays
Writers
Paul Huston, Joseph F. Poland, Barry Shipman
Cast
| Name | Character |
|---|
| Edmund MacDonald | Anthony Waldron |
| Pamela Blake | Shirley Clinton |
| Danny Morton | Derek Lamont |
| Virginia Brissac | Cornelia Waldron |
| Joseph Crehan | Police Chief Dan Blair / Dan Blair |
| Jack Ingram | William Shrag |
| Dennis Moore | Agent Grant Farrell |
| Richard Martin | Detective Lt. Kirby Walsh |
| Byron Foulger | Wetherby |
| Jane Randolph | Marina Lamont |
| William Ching | Jim Farrell [Chs. 1-3] / Jim Farrell |
| Joe Haworth | Donninger |
| Patricia Alphin | Ms. Buckley [Chs. 7, 9] |
| Robert Barron | Brock [Ch. 1] |
| Walden Boyle | Mr. Skinner [Ch. 10] |
| Douglas Carter | Barron [Ch. 3] |
| Frank Cody | Smith |
| Cyril Delevanti | Prof. Jackson Parker [Chs. 5-6, 9] |
| Helen Deverell | Nurse [Chs. 2-4] |
| Bruce Donovan | Waterfront Cop |
Producers
| Name | Role |
|---|
| Morgan Cox | Executive Producer |
| Joseph O'Donnell | Producer |
