- Country: UK
- Genres: Crime, Drama, Mystery
- Release: 1940-06-15
- Director: Norman Lee
- Writers: Victor Kendall , Elizabeth Meehan , Doreen Montgomery , Edgar Wallace
- Language: English
- Stars: Gibb McLaughlin , Sara Seegar , Peter Murray-Hill , Sally Gray , D.J. Williams , Malcolm Keen , Leslie Perrins , Robert Cochran , George Merritt , Philip Ray
- Runtime: 71 min
- Awards: N/A
- AKA: Mystery of Room 13 (United States of America) , Mr. Reeder in Room 13 (United Kingdom) , Mr. Reeder in Room 13
- Plot: Mr. J.G. Reeder is called in by the Bank of England to investigate a gang of forgers. Reeder enlists the aid of a younger man, Capt. Johnnie Gray, to infiltrate the gang by going undercover in Dartmoor jail.
- IMDB:tt0030471
Mystery of Room 13 Cast · · · ALL
Norman Lee
Director
Peter Murray-Hill
Capt. Johnnie Gray
Sally Gray
Claire Kent
Gibb McLaughlin
Mr. J.G. Reeder
Malcolm Keen
Peter Kent
Leslie Perrins
Jeffrey Legge (Maj. Jeffrey Floyd)
Sara Seegar
Lila Legge
D.J. Williams
Emmanuel Legge
Robert Cochran
Det. Insp. Barker
Philip Ray
Fenner
Bobbie Comber
Gray's butler
George Merritt
Bert Stevens, club porter