The Brain

Arthur Lespinasse

Jean-Paul Belmondo

Anatole

Bourvil

Colonnel Carol Matthews, aka 'Le Cerveau'

David Niven

Frankie Scannapieco, godfather of the Italian mafia

Eli Wallach

Sofia Scannapieco, Frankie's sister

Silvia Monti

Commissioner

Raymond Gérôme

Inspector Mazurel, assistant to the commissioner

Fernand Guiot

Inspector Pochet

Jacques Balutin

Inspector Dubœuf

Jacques Ciron

Belgian Sergeant of the armoured car

Patrick Préjean

Belgian soldier of the armored car (with a cold)

Robert Dalban

Belgian soldier of the armored car

Raoul Delfosse

Belgian soldier of the armored car

Roland Monk

Jean-François, antique dealer in Le Havre

Mario David

Chief warden of Poissy prison

Henri Génès

Warden of Poissy prison

Yves Barsacq

Warden of Poissy prison

Dominique Zardi

Antique dealer in Le Havre, Jean-François’ partner

Max Montavon

André, the flooded owner of the 5th floor

Paul Mercey

Member of the Colonel's gang

Henri Attal

Superintendent Cummings

Tommy Duggan

Blonde on the train

Sophie Grimaldi

Boss of the shop

Roger Lumont

Member of the Italian mafia

John Rico

Member of the Italian mafia

Arch Taylor

Trevor A. Stephens

Belgian Soldier in Armored Car (uncredited)

Pierre Tornade

André's Wife (uncredited)

Micha Bayard

Policeman in Le Havre (uncredited)

Gérard Hernandez

(uncredited)

César Torres

(uncredited)

Yvon Dihé