To celebrate the 40th anniversary, the classic BBC drama series is available on Blu-ray and in true HD for first time ever. In BAFTA-winner Sir Alec Guinness’s first major TV role he plays George Smiley, a retired agent who is secretly brought into ‘the Circus’ (the code name for British Secret Intelligence Service) to root out a top-level mole. Gradually piecing together the story, the weary but determined Smiley trawls through the murky waters of Cold War espionage and his own past.