Tinker, Tailor, Soldier, Spy (1979) (UK-import)
Superspy George Smiley (Alec Guinness) has for some time been in 'retirement' - some say due to his mishandling of the Czech scandal. However, the retiring masterspy finds himself summoned back to the 'Circus' (British secret service) when it transpires that an enemy infiltrator is at work in the department.