Other titles: The Spiral Staircase | La escalera de caracol | Die Wendeltreppe | No Silêncio das Trevas | Silêncio nas Trevas | Спиралната стълба | Deux mains dans la nuit | Spiralno stubište | Točité schodiště | Vindeltrappen | Kierreportaat | Deux mains, la nuit | Βουβός πόθος | Csigalépcső | La scala a chiocciola | らせん階段（1946） | De wenteltrap | Spiraltrappen | Kręte schody | A Escada de Caracol | Scara în spirală | Spiralne stepenice | Винтовая лестница | Spiraltrappan | Döner merdiven | Silence of Helen McCord | Some Must Watch
Year Released: 1946
Month released: January
Certification: Argentina:13, Australia:A, Australia:PG, Finland:K-16, Germany:16, Iceland:12, Italy:T, Netherlands:Unrated, Norway:16, Portugal:M/12, Spain:A, Sweden:15, United Kingdom:A, United Kingdom:PG, United States:Approved, United States:TV-PG, West Germany:16
Directors: Robert Siodmak
Cast: Charles Wagenheim, Dorothy McGuire, Ellen Corby, Elsa Lanchester, Erville Alderson, Ethel Barrymore, George Brent, George Holmes, Gordon Oliver, James Bell, Kent Smith, Larry Wheat, Myrna Dell, Rhonda Fleming, Rhys Williams, Richard Tyler, Robert Siodmak, Sara Allgood, Stanley Price
Producers: Dore Schary
Additional Crew: Alberto Sordi, Amina Pirani Maggi, Clara Ristori, Edgar Peterson, Gaetano Verna, Giorgio Capecchi, Giovanna Scotto, Gualtiero De Angelis, Lauro Gazzolo
Certification: Argentina:13, Australia:A, Australia:PG, Finland:K-16, Germany:16, Iceland:12, Italy:T, Netherlands:Unrated, Norway:16, Portugal:M/12, Spain:A, Sweden:15, United Kingdom:A, United Kingdom:PG, United States:Approved, United States:TV-PG, West Germany:16
Cinematographers: Nicholas Musuraca
Colorization: Black and White
Country: United States
Distributors: 20th Century Fox Video, A&M Associates, ABC Video Enterprises, American Broadcasting Company (ABC), American Movie Classics (AMC), Anchor Bay Entertainment, Artaire Films, Atlas Video, Austria, CBS/Fox, El 9 Besepi S.L., Epoca, Filmjuwelen, Greg Lynch Film Distributors, International Coproductions, Kino Lorber, Kommunenes Filmcentral (KF), Laser Paradise, Lux Film, Magnetic Video, Meteor Film Productions, MGM Home Entertainment, Nord Video, Norsk Rikskringkasting (NRK), Pisces Group, Polyband & Toppic Video / WVG, Rai Movie, Research Entertainment, RKO Distributing Corporation of Canada, RKO Pictures (Australasia), RKO Radio Films, RKO Radio Films A/S, RKO Radio Pictures, RKO Radio Pictures Argentina, Selznick Releasing Organization, Sony Pictures Home Entertainment, Star Video, WME Home Entertainment
Languages: English
Production Managers: Fred Fleck
Set Decorators: Darrell Silvera
Special Effects: Vernon L. Walker
Stunts: Gordon Carveth