- HD 1080
- Runtime: 65m.
- Status: Released
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- Languages: en
- Country: United States of America
- Director: Gus Meins
- Stars: Michael Whalen, Lynne Roberts, Chick Chandler, Mabel Todd, Frank M. Thomas
- keywords: scotland yard
- Production_studio: Republic Pictures
- Slogan: X-TRA THRILLS...X-TRA LAUGHS...E-TRA ENTERTAINMENT
- The The Mysterious Miss X is featured in the top rankings of 1939
- #22 in Top Mystery Movies of 1939
After being mistaken for Scotland Yard detectives, two vaudevillians (Michael Whalen, Chick Chandler) try to solve a murder in a Midwestern town.