An American scientist is sent by the CIA to East Germany to retrieve a secret microfilm from a Soviet scientist interested in defecting to the West but the Stasi secret police's surveillance complicates matters.
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)
