• Release Date: November 1973 (USA)
• Genre: Thriller
• Also Known As: Die Schlange (West Germany)
  Il serpente (Italy)
  Night Flight from Moscow (USA) (reissue title)
  The Serpent (USA)
  
• Runtime: USA:113 min | Japan:120 min | UK:124 min
• Country: France | Italy | West Germany
• Language: English | German | French
• Color: Color (Eastmancolor)
• Sound Mix: Mono
• Certification: Finland:K-16 | Sweden:15 | USA:PG | Netherlands:12
• Filming Locations: France
• Company: Euro International Film (EIA)

Summary :Vlassov (Yul Brynner) is a Soviet spy. In France, Vlassov defects. He is whisked to the U.S.A., where Allan Davies (Henry Fonda) takes over the case. After polygraph tests and cross-examinations, Vlassov names several Western European agents who are also spying for the Soviets. Davies wants to take the listed agents into custody; meanwhile, those on the list start dying under mysterious circumstances.

Actors: Yul Brynner, Henry Fonda, Dirk Bogarde, Philippe Noiret, Michel Bouquet, Virna Lisi, Guy Tréjan, Elga Andersen, Marie Dubois, Nathalie Nerval, André Falcon, Robert Party, William Sabatier, Robert Alda, Paola Pitagora, Luigi Diberti, François Maistre, Thomas Hunter, Larry Dolgin, Igor De Savitch, Herbert Fux, Eva Maria Meineke, Alan Scott, Martin Held, Farley Granger, , Jean Desailly, François Dyrek, Ernst Fritz Fürbringer, Robert Le Béal, Mike Marshall, Wolf Petersen, Claudia Rieschel

Directors: Henri Verneuil

Writers: Gilles Perrault, Henri Verneuil

Producers: Henri Verneuil

Music: Ennio Morricone