L'espion

Montgomery Clift

as Professor James Bower

Hardy Krüger

as Counselor Peter Heinzmann

Macha Méril

as Frieda Hoffmann

David Opatoshu

as Orlovsky

Christine Delaroche

as Ingrid Weiß

Hannes Messemer

as Dr. Saltzer

Karl Lieffen

as Major Windisch

Uta Levka

as Mädchen unter der Dusche

Roddy McDowall

as Agent Adams

Johannes Buzalski

as Agent (uncredited)

Eckart Dux

as Professor James Bower (voice) (uncredited)

Jean-Luc Godard

as Orlovsky's Friend (uncredited)

Eduard Linkers

as Fluchthelfer Franz Ritter (uncredited)

Franz Rudnick

as Dr. Saltzer (voice) (uncredited)

Rolf Zacher

as Tommy (uncredited)