The Fourth Protocol 1987

The Fourth Protocol

Released: 1987

Storyline:

 In 1968, an East-West agreement is established to halt nuclear proliferation. One of its clauses, the Fourth Protocol, forbids the non-conventional delivery of a nuclear weapon to a target.

MI5 officer John Preston breaks into the residence of British government official George Berenson on New Year's Eve and finds a number of top secret NATO files that should not have been there. He reports his findings to high-ranking British Secret Service official Sir Nigel Irvine, who deals with the leak. Preston's unauthorised method of retrieving the documents embarrasses the acting Director of MI5, Brian Harcourt-Smith, and as punishment for his insubordination, Preston is relegated to lowly "Airports and Ports".