First broadcast 25th November 1978.<br /><br />Years earlier spy Thomas Darby sold out and defected to the Russians. Now he has returned to England.<br /><br />Gordon Jackson - George Cowley<br />Martin Shaw - Doyle<br />Lewis Collins - Bodie<br />Robert Urquhart - Darby<br />André Morell - Brig. Stadden<br />Alan MacNaughtan - Sorenson<br />Carol Royle - Helen Pierce<br />George Murcell - Yashinkov<br />Billy Boyle - O'Leary<br />Robin Parkinson - Taxi Driver<br />Shelagh Fraser - Elsa<br />Myles Hoyle - Lewis<br />Michael Petrovitch - Callinari<br />Chris Dillinger - Russian Aide 1<br />Terence Mountain - Russian Aide 2<br />Norman Rutherford - Cleric<br />Lewis Alexander - Commuter<br />Walter Henry - Cantwell<br />Aileen Lewis - One of Stadden's Operatives
