Jean-Paul Belmondo

as Commissioner Jean Letellier

Charles Denner

as Inspector Moissac

Adalberto Maria Merli

as Pierre Valdeck / Minos

Rosy Varte

as Germaine Doizon

Jean Martin

as Divisional commissioner Sabin

Lea Massari

as Norah Elmer

Jean-François Balmer

as Julien Dallas, student

Catherine Morin

as Hélène Grammont