With a screenplay by Paul Dehn and Guy Trosper from the groundbreaking realist espionage novel of 1963 by the man known as John Le Carre, this is just as complex – in terms of narrative and morals – as the source material. Richard Burton is the British agent unwillingly retired who plays a role to entice an operation run by Control (Cyril Cusack) that will bring him back in the game. Along the way he falls in love with naive Communist Party member Nan (Claire Bloom, a real-life former lover) and we meet George Smiley for the first time on screen (played here by Rupert Davies). The stakes are high and agent Fiedler (Oskar Werner) is running a very dangerous line of enquiry which ends up in a trial at the East German’s presidium. Lives are exchanged with a brutal ending. Shot on location for the most part in Dublin which brought glamour to the dear old dirty place in the form of Burton and Taylor at the height of their fame. Berlin never looked like this – did it?! Grim but repays at the very least a second viewing for unbelievers. Burton is great.