A Deadly Game
Keith Waterhouse (screenplay), Brian Freemantle (novel)
David Hemmings as Charlie Muffin, Sam Wanamaker as Ruttgers, Jennie Linden as Edith, Ian Richardson as Cuthbertson, Ralph Richardson as Sir Archibald Willoughby
A new head of MI6 wants the old gone and that definitely includes Charlie Muffin. Then a Soviet spymaster indicates he might defect and it falls to Muffin to get him before the CIA can.