At the height of the cold war, a known Russian spy ("Kyril") is sent to the UK under falsely reported pretenses in order to hopefully indirectly spark an unknown mole in the KGB to reveal himself; the endeavor eventually has repercussions which none of the initial players could have predicted.
Ian Charleson
Edward Woodward
Joss Ackland
Richard E. Grant
John McEnery
Denholm Elliott
Peter Vaughan
Espen Skjønberg
James Laurenson
Sven-Bertil Taube
Catherine Neilson
Hugh Fraser
Tor Stokke
Peter Wight
Dermot Crowley
James Cosmo
Charles Simon
Hugh Ross
Terence Harvey
Antony Carrick
Alec Linstead
Christopher Driscoll
David Lyon
Caroline Holdaway
Geff Francis
Julie Neubert