- Country: UK
- Genres: Crime, Drama
- Release: 1936-07-18
- Director: Adrian Brunel
- Writers: Heinrich Fraenkel , A.R. Rawlinson , Victor Varconi
- Language: English
- Stars: Victor Varconi , Joan Maude , D.A. Clarke-Smith , J. Hubert Leslie , Joan Matheson , J.A. O’Rourke , Shayle Gardner , Wilfred Noy , Frank Barclay , Cecil Bishop
- Runtime: 70 min
- Awards: N/A
- AKA: While London Sleeps , Menace , Menace (United Kingdom) , When London Sleeps (United States of America) , Without Warning (United States of America) , Sabotage (United Kingdom) , 血と悪魔 (Japan) , Den mystiske Attentatmand (Denmark) , O Destruidor (Brazil)
- Plot:
Police investigating a string of train crashes discover that they were all caused by sabotage.
- IMDB:tt0137103
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