Helmut Berger as Dr. Frank Flamand

Brigitte Lahaie as Nathalie

Telly Savalas as Terry Hallen

Christopher Mitchum as Sam Morgan

Stéphane Audran as Mrs. Sherman

Caroline Munro as Barbara Hallen

Christiane Jean as Ingrid Flamand

Anton Diffring as Dr. Karl Heinz Moser

Tilda Thamar as Mrs. Francois

Howard Vernon as Dr. Orloff

Florence Guérin as Florence Guérin

Gérard Zalcberg as Gordon

Henri Poirier as Inspector Legris

Lina Romay as Mrs. Orloff

Amelie Chevalier as Mélissa

Doris Thomas as The Singer

Jean Tolzac as Desk Clerk

Pascale Vital as Barmaid