Il était une fois un flic...

Michael Lonsdale

Commissioner Lucas

Michel Constantin

Commissioner Campana alias Louis Lopez

Mireille Darc

Christine alias Françoise

Robert Dalban

Commissioner Chauvet, Superintendent in Nice

Daniel Ivernel

Ligmann

Venantino Venantini

Felice, killer

Hervé Hillien

Bertrand, Christine's son

Henri Guybet

PJ inspector

Robert Castel

Rodriguez, Manoni's man

Giuliano Esperanti

Second killer

Jean-Jacques Moreau

PJ inspector

Charles Southwood

Narcotic Bureau agent

Dado Crostarosa

One of the two young Portuguese

Jean Luisi

Second taxi driver

Fransined

First taxi driver

Phyllis Major

Marianne Halifax

Ghislain Oyac

Manoni's secretary

Paul Clerici

Jeanne Costi

Daniel Auguste

Policeman

Pitsolu Dimitrius

Charly Bertoni

Narcotic Bureau agent

Hans Vervez

Henri Dugène

Henri Cogan

Jeannot, Manoni's man (uncredited)

Alain Delon

Man looking for Rodriguez (uncredited)

Pier Paolo Capponi

Ugo (uncredited)