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