Alec Guinness

George Smiley

Michael Jayston

Peter Guillam

Anthony Bate

Sir Oliver Lacon

George Sewell

Mendel

Bernard Hepton

Toby Esterhase

Ian Richardson

Bill Haydon

Hywel Bennett

Ricki Tarr

Michael Aldridge

Percy Alleline

Ian Bannen

Jim Prideaux

Terence Rigby

Roy Bland

Alec Sabin

Fawn

Beryl Reid

Connie Sachs

Alexander Knox

Control

Duncan Jones

Roach

Daniel Beecher

Spikely

Nigel Stock

Roddy Martindale

Milos Kirek

Barak

Eugene Lipinski

Czech Guard

Brian Hawksley

Bookseller

Thorley Walters

Tufty Thessinger

Susan Kodicek

Irina

Hilary Minster

Boris

Pauline Letts

Mrs Pope-Graham

Stephen Earle

Norman

Frank Compton

Bryant

Frank Moorey

Lauder Strickland

Timothy Stetson

The American

Jean Rimmer

Senior Secretary

Patrick Stewart

Karla

Marjorie Hogan

Alisa Brimley

Joe Praml

Paul Skordeno

Warren Clarke

Alwyn

John Standing

Sam Collins

Mandy Cuthbert

Molly Purcell

Joss Ackland

Jerry Westerby

Guy Standeven

Flemyng-Smith

John Wells

Headmaster

Betty Hardy

Headmaster's Mother

Jo Apted

Linda

Siân Phillips

Ann Smiley

George Pravda

Polyakov

Robert MacNeil

Self – Host (uncredited)

Reg Thomason

Reception (uncredited)

Terry Pearson

Schoolmaster (uncredited)

Michael Fish

Self (archive footage)