The Whistle Blower is a 1986 British spy thriller film directed by Simon Langton and starring Michael Caine, James Fox, Nigel Havers, Felicity Dean, John Gielgud, Kenneth Colley, Gordon Jackson, David Langton, and Barry Foster. It is based on the novel of the same name by John Hale.

Plot

Frank Jones (Caine) is a retired British naval officer and Korean War veteran, who is now a businessman. His bright but naive and idealistic son, Robert (Nigel Havers), works as a linguist at GCHQ, the top secret British intelligence listening station, using his love of Russian to listen to various pieces of communication on the other side of the Iron Curtain.