Claire Bloom as Suzanne Mallison

James Mason as Ivo Kern

Hildegard Knef as Bettina

Geoffrey Toone as Martin Mallison

Hilde Sessak as Lizzi

Aribert Wäscher as Halendar

Ernst Schröder as Olaf Kastner

Dieter Krause as Horst

Karl John as Inspector Kleiber

Ljuba Welitsch as Opera singer

Reinhard Kolldehoff as Kolldehoff EaEasstern German Police Officer commanding the hunt for Ivo Kern and Susanne Mallison (uncredited)

Frederick Schiller as Construction Worker on Generator (uncredited)

Emile Stemmler as Waiter in Restaurant (uncredited)