Maurice Ronet
Philippe Greenleaf
Erno Crisa
Inspector Riccordi
Viviane Chantel
Belgian Lady
Nerio Bernardi
Agency Director
Barbel Fanger
Mr. Greenleaf
Lily Romanelli
Housekeeper
Elvira Popescu
Mrs. Popova
Romy Schneider
Freddy's Companion (uncredited)
Paul Müller
Blind Man (uncredited)
René Clément
Clumsy waiter (uncredited)
Jacqueline Parey
Ingrid (uncredited)
Leonello Zanchi
Police inspector (uncredited)
Walter Grant
Purchaser of the yacht (uncredited)
Nino Vingelli
(uncredited)