"A French diplomat is surveilled by a secret service to find a weakness for political control, his private life becoming 'File No. 51'."
François Marthouret
as Dominique Auphal / 51
Roger Planchon
as Esculape 1
Patrick Chesnais
as Hadès
Jean Martin
as Vénus
Daniel Mesguich
as Esculape 4
Anna Prucnal
as Sarah Robski
László Szabó
as Sarah Robski's contact
Didier Sauvegrain
as Pylos
Uta Taeger
as Esculape 2
Jenny Clève
as Agent 747, cleaning lady of 51
Claude Marcault
as Liliane Auphal / 52
Françoise Lugagne
as Mrs. Auphal, Dominique's mother
Claire Nadeau
as Friend 9000
Jean-Michel Dupuis
as Agent Hécate 8446
Christophe Malavoy
as Agent 8956
Sacha Pitoëff
as Minerve 1 (voice)
Isabelle Ganz
as Tease
Nathalie Juvet
as Marguerite Marie
Sabine Glaser
as Paméla
Michel Aumont
as Mars (voice)
Liliane Coutanceau
as Secretary (voice)
Jean Mermet
as Minerve 2 (voice)
Jean Dautremay
as Esculape 3
Gérard Dessalles
as Comrade of 51 in the regiment
Philippe Rouleau
as Philippe Lescarre
Michel Deville
Director
Writer
Gilles Perrault
Claude Lecomte
Director of Photography
Joël Beldent
Sound Designer
Noëlle Galland
Production Design
Philippe Dussart
Producer
Jean Pantaloni
Jean Schwarz
Music
Raymonde Guyot
Editor