马修·麦克费登

Matthew Macfadyen

饰：Self - Narrator,

Stephen Lander

饰：Himself - MI5 Director General 1996-2002

Christopher Andrew

饰：Himself - Author `Defence of the Realm`

Cynthia Postan

饰：Herself

Michael R.D. Foot

饰：Himself - Rtd. SAS Brigade Intelligence Officer

Chapman Pincher

饰：Himself - Journalist, Daily Express

Oleg Gordievsky

饰：Himself - Former KGB Colonel

Carmen Proetta

饰：Herself - Witness

Anthony Blunt

饰：Himself

哈罗德·威尔逊

Harold Wilson

饰：Himself