Lino Ventura as Principal Inspector Marceau Leonetti

Marlène Jobert as Jeanne Dumas, the new auxiliary

Michel Constantin as Greg, the henchman

Paul Crauchet as Jacques Loring, Martin's neighbor

Alain Mottet as Frank Lambert, Leonetti's colleague and friend

Béatrice Arnac as Silvia

Guy Heron as Soramon

Albert Dagnant as Arnold

Monique Mélinand as Mrs Loring

Marcel Pérès as Mr Lenoir

Germaine Delbat as Mrs Lenoir

Hervé Sand as Gravel

Régine Lovi as Ms Viteau, the teacher

Philippe March as Roger Martin, the missing witness

Mathilde Ceccarelli as Perverse neighbor

Pippo Merisi as Scrap dealer

Raymond Meunier as Allister

Jacques Marchand as Maniac

Frédéric Santaya as Favre, Allister's teammate

Robert Favart as School's director

Guy Kerner as Doctor

Jean Sobieski as Aden

Pascal Gillot as

Paul Beauvais as

Aude Olivier as

Carlo Nell as

Luigi Cortese as

Lucie Arnold as

Gilette Barbier as Grocer (uncredited)

Luc Bartholomé as Jo Raison (uncredited)

Philippe Brizard as Taxi driver (uncredited)

Michel Charrel as Raisin (uncredited)

Roger Desmare as Shoemaker (uncredited)

Max Desrau as Thouin (uncredited)

Pierre Duncan as Agent at the police station (uncredited)

Martine Ferrière as Shoemaker's wife (uncredited)

Sébastien Floche as Caretaker of the building (uncredited)

Pierre Frag as Sandwich man (uncredited)

Jacques Galland as Director of P.J. (uncredited)

Stan Krol as Kropniak (uncredited)

Jacques Leroy as Inspector (uncredited)

Sylvain Lévignac as Gregg man (uncredited)

Roger Lumont as Storage man (uncredited)

Serge Marquand as Loudmouth (uncredited)

Colette Mars as First pharmacist (uncredited)

Bernard Musson as Pharmacist (uncredited)

Émile Riandreys as Bus traveler (uncredited)

Jacques Richard as Inspector (uncredited)

César Torres as Man with the grenade (uncredited)

Dominique Zardi as Pervert (uncredited)

Suzy Hannier as (uncredited)

Rita Maiden as (uncredited)