Mr. Reeder in Room 13 is a 1938 British crime film directed by Norman Lee and starring Peter Murray-Hill, Sally Gray and Gibb McLaughlin. It is based on the first J. G. Reeder book, Room 13 by Edgar Wallace. The film was released in the U.S. in 1941 as Mystery of Room 13.

Plot

Mr. J.G. Reeder (Gibb McLaughlin) 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 (Peter Murray Hill), to infiltrate the gang by going undercover in Dartmoor jail.