Defence of the Realm (1986)

Director: David Drury
Cast: Bill Paterson, David Calder, Denholm Elliott, Frederick Treves, Fulton Mackay, Gabriel Byrne, Greta Scacchi, Ian Bannen

Synopsis:

A reporter named Mullen ‘stumbles’ onto a story linking a prominent Member of Parliament to a KGB agent and a near-nuclear disaster involving a teenage runaway and a U.S. Air Force base. Has there been a Government cover-up? Mullen teams up with Vernon Bayliss, an old hack, and Nina Beckam, the MP’s assistant, to find out the truth.