Anthony Bate

Character: Kim Philby

Derek Jacobi

Character: Guy Burgess

Michael Culver

Character: Donald Maclean

Ingrid Hafner

Character: Aileen Philby

Elizabeth Seal

Character: Melinda Maclean

Richard Hurndall

Character: Sir Stewart Menzies

Philip Stone

Character: Farquesson

Peter Vaughan

Character: Philby's Control

Arthur Lowe

Character: Herbert Morrison

Bernard Archard

Character: Graves

Oliver Ford Davies

Character: Pattterson

Robin Hooper

Character: Reed

Patrick Holt

Character: Peterson

David Markham

Character: Skardon

Barrie Cookson

Character: Helenus Milmo

Hugh Morton

Character: Marcus Lipton

Tony Sibbald

Character: Reporter

Richard Hampton

Character: Major Sansom

Anthony Langdon

Character: Volkov