Richard Burton
Alec Leamas

Claire Bloom
Nan Perry

Oskar Werner
Fiedler

Sam Wanamaker
Peters

George Voskovec
East German Defense Attorney

Rupert Davies
George Smiley

Cyril Cusack
Control

Peter van Eyck
Hans-Dieter Mundt

Michael Hordern
Ashe

Robert Hardy
Dick Carlton

Bernard Lee
Patmore

Beatrix Lehmann
Tribunal President

Esmond Knight
Old Judge

Niall MacGinnis
German Checkpoint Guard

Anne Blake
Miss Crail

Richard Marner
Vopo Captain

Warren Mitchell
Mr. Zanfrello

Steve Plytas
East German Judge

Tom Stern
CIA Agent

David Bauer
Young Judge (uncredited)

Richard Caldicot
Mr. Pitt - Employment Officer (uncredited)

Walter Gotell
Holten (uncredited)

Geoffrey Keen
British Sentry (Sgt.) at Checkpoint Charlie (uncredited)

Philip Madoc
Young German Officer (uncredited)

Nancy Nevinson
Mrs. Zanfrello - Grocery Customer (uncredited)

John Quentin
Pawson (uncredited)

Michael Ripper
Lofthouse - Library Assistant (uncredited)