First broadcast 5th October 1980.
Andy Drake, a protégé of Cowley, is arrested on suspicion of spying for the Chinese.
Gordon Jackson - George Cowley
Martin Shaw - Doyle
Lewis Collins - Bodie
Patrick O'Connell - Manton
Norman Jones - Andy Drake
Karin MacCarthy - Sara Ryan (as Karin McCarthy)
Niall Buggy - Gorky
Simon Oates - Tully
Richard LeParmentier - Ivan (as Richard Parmentier)
David King - Ambassador
Tom Georgeson - Pymar
Bernard Gallagher - Minister
Chua Kah Joo - Choy (as Chua Kahjoo)
Yuri Borienko - Maroff
Anthony Chinn - Sikor
Kristopher Kum - Minder
Nigel Miles-Thomas - 1st Cop
Mike Kemp - 2nd Cop
