Stemmen i mørket was released in the year 1962。Stemmen i mørket is also called as Experiment in Terror, Operazione terrore, Mercader del terror, Mercader de terror, Kestävyyskoe, Kauhun lunnaat, Chantaje contra una mujer, brigade spéciale, Allô, Letzte Zug。

Kelly Sherwood is terrorized by a man with an asthmatic voice who plans to use her to steal $100,000 from the bank where she works. He threatens to kill her teenage sister Toby, if she tells the police. However she manages to contact F.B.I. agent Ripley.

Stemmen i mørket actors and actresses include Lee Remick, Stefanie Powers。