First broadcast 17th November 1979.
Stefan Batak, a Bulgarian who has been spying for Britain, is released as part of an exchange of agents, and CI5 are charged with his safety as well as establishing whether his information is genuine.
Gordon Jackson - George Cowley
Martin Shaw - Doyle
Lewis Collins - Bodie
Derek Godfrey - Stefan Batak I
Carol Royle - Anna Batak
Alan Tilvern - Stefan Batak II
Milos Kirek - Paul
Michael Hadley - Michael
Sally Harrison - Chauffeuse
Gabor Vernon - Vashunin
Jeffrey Chiswick - Bulgarian Officer
Walter McMonagle - Reporter
Jane Sumner - Bride
Arnold Chazen - Man at the marriage
Dave Cooper - Thug
Paul Heasman - CI5 Agent
Beverley Keys - Bridesmaid
