Film City in Darkness (Tytuł oryginalny City in Darkness) ma w głównych rolach Harold Huber (Police Inspector Marcel Spivak), Pedro de Cordoba (Antoine), Lynn Bari (Marie Dubon), Dorothy Tree (Charlotte Ronnell), Noel Madison (Belescu), Leo G. Carroll (Louis Santelle), C. Henry Gordon (Prefect of Police J. Romaine), George Davis (Alex), Douglass Dumbrille (B. Petroff (as Douglas Dumbrille)), Adrienne D'Ambricourt (Hotel Proprietress), Lon Chaney Jr. (Pierre), Eugene Borden (Gendarme), Frederick Vogeding (Captain), Ann Codee (Complainant at Police), Albert Conti (Travel Agency Manager), Gino Corrado (Proprietor of Wine Cellar), John George (Victor the Gypsy, gangland bistro patron (cameo extra)), Michael Mark (Mechanic), Alphonse Martell (Gendarme), Alberto Morin (Clerk), Frank Puglia (Gendarme at Steamship Office), Rolfe Sedan (Hotel Clerk), George Sorel (Plainclothesman), Larry Steers (Man Leaving Paris), Poppy Wilde (One of Petroff's Girlfriends) Data premiery filmu to 15.11.1939. Film, w ramach którego jest produkowany 20th Century Fox . Nakręcony w następujących lokalizacjach: 20th Century Fox Studios - 10201 Pico Blvd., Century City, Los Angeles, California, USA . Kraje produkcyjne: United States of America Gatunek filmu: Kino Kryminał, Kino Thriller, Kino Tajemnica