- Country: France, Italy, Portugal, West Germany
- Genres: Drama
- Release: 1964-12-17
- Director: Pierre Kast
- Writers: Alain Aptekman , Pierre Kast
- Language: French
- Stars: Lilli Palmer , Pierre Brasseur (1905–1972) , Laurent Terzieff , Paul Hubschmid , Guido Alberti , Sylva Koscina , Antoine Duhamel , Rogério Paulo , Clara D’Ovar , José D’Oreg
- Runtime: 105 min
- Awards: N/A
- AKA: O Triângulo Circular (Portugal, Portuguese Republic) , Il triangolo circolare (Italy) , Le grain de sable , El triángulo del crimen (Spain) , Mannen med klumpfoten (Sweden) , Die Unmoralischen , Le triangle , Le Grain de sable (France, French Republic) , The Circular Triangle (United States of America)
- Plot: Magnate of a powerful trust, Coppolos has just been sent "ad patres" by the explosion of his private plane. A young civil servant, full of future, at the Ministry of Foreign Affairs, Laurent, reveals to the commissioner in charge of the investigation that this murder meets conflicting interests, related to the east and to the west, as it should be. The west is called Alain Compton, the east is Georges Richter. There remains Anna Maria, former mistress of Coppolos, former wife of Richter, who probably would like to share in the cake and, meanwhile, lets himself be wooed by Alain.
- IMDB:tt0058158
Le grain de sable Cast · · · ALL
Pierre Kast
Director
Lilli Palmer
Anna-Maria di Scorza
Pierre Brasseur
(1905–1972)
Georges Richter
Laurent Terzieff
Laurent
Paul Hubschmid
Alain Compton
Guido Alberti
Rudolf Kubler
Sylva Koscina
Alexandra Fonseca
Antoine Duhamel
L'inspecteur de police
Rogério Paulo
Clara D’Ovar
José Fonseca e Costa
René Arrieu
Miguel Franco
Serge Nadaud