Running Blind is based on the best-selling novel by Desmond Bagley.
The hero is Alan Stewart, a British secret agent who quit the service in 1974 when he discovered his superiors duped him into killing one of his colleagues.
Update to Scotland 1978, where Stewart is visited in his hideaway by his former boss, a charmingly evil chap named Slade, who gives him a choice:
Either do a simple errand, or Slade will tell KGB agent Kennikin, Stewart's old adversary, where he is. Not only that, but Slade will blab all about Stewart's girlfriend in Iceland.