
Jean-Paul Belmondo
Arthur Lespinasse
Acting

David Niven
Colonnel Carol Matthews, aka 'Le Cerveau'
Acting

Eli Wallach
Frankie Scannapieco, godfather of the Italian mafia
Acting

Silvia Monti
Sofia Scannapieco, Frankie's sister
Acting

Raymond Gérôme
Commissioner
Acting

Fernand Guiot
Inspector Mazurel, assistant to the commissioner
Acting

Jacques Balutin
Inspector Pochet
Acting

Jacques Ciron
Inspector Dubœuf
Acting

Patrick Préjean
Belgian Sergeant of the armoured car
Acting

Robert Dalban
Belgian soldier of the armored car (with a cold)
Acting

Raoul Delfosse
Belgian soldier of the armored car
Acting
![Roland Monk]()
Roland Monk
Belgian soldier of the armored car
Acting

Mario David
Jean-François, antique dealer in Le Havre
Acting

Henri Génès
Chief warden of Poissy prison
Acting

Yves Barsacq
Warden of Poissy prison
Acting

Dominique Zardi
Warden of Poissy prison
Acting
![Max Montavon]()
Max Montavon
Antique dealer in Le Havre, Jean-François’ partner
Acting

Paul Mercey
André, the flooded owner of the 5th floor
Acting

Henri Attal
Member of the Colonel's gang
Acting

Tommy Duggan
Superintendent Cummings
Acting

Sophie Grimaldi
Blonde on the train
Acting

Roger Lumont
Boss of the shop
Acting

John Rico
Member of the Italian mafia
Acting
![Arch Taylor]()
Arch Taylor
Member of the Italian mafia
Acting

Pierre Tornade
Belgian Soldier in Armored Car (uncredited)
Acting

Micha Bayard
André's Wife (uncredited)
Acting

Gérard Hernandez
Policeman in Le Havre (uncredited)
Acting
![César Torres]()
César Torres
(uncredited)
Acting
![Yvon Dihé]()
Yvon Dihé
(uncredited)
Acting