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
