Lino Ventura as Abel Davos

Jean-Paul Belmondo as Éric Stark

Sandra Milo as Liliane

Marcel Dalio as Arthur Gibelin

Michel Ardan as Henri Vintran, aka 'Riton'

Simone Desmaison as Thérèse Davos

Michèle Méritz as Sophie Fargier

Stan Krol as Raymond Naldi

Evelyne Ker as Gibelin's daughter

Betty Schneider as Little maid

France Asselin as Denise Vintran

Jean-Pierre Zola as Boss of the detective agency

Sylvain Lévignac as Agency detective

Jeanne Pérez as Jacqueline Chapuis

René Génin as Mr. Chapuis

Charles Blavette as Mr. Bénazet

Philippe March as Jean Martin

Corrado Guarducci as Ferucci

Robert Desnoux as Pierrot Davos

Thierry Lavoye as Daniel Davos

Claude Cerval as Raoul Fargier

Jacques Dacqmine as Commissioner Blot

Max Amyl as Stage manager (uncredited)

Marcel Bernier as Inspector (uncredited)

Jean Combal as Policeman of Nice (uncredited)

Albert Daumergue as Riton man (uncredited)

Lucien Desagneaux as Billiard player (uncredited)

Bernard Dhéran as Blastone (uncredited)

Marcel Gassouk as Man at the Nice police station (uncredited)

Guy Henry as Inspector (uncredited)

Laure Paillette as Elevator woman (uncredited)