"No doubt remains, a mole has infiltrated the Circus, code name for the British Secret Intelligence Service. It can only be one of four men operating at the very highest level. Sidelined agent George Smiley is covertly tapped to root out the mole, a task that requires a painstaking dig through the double-blind world of Cold War espionage and his own past"--Container.

Based on the novel by John Le Carré. Originally produced for television in 1979.

disc 1. Episodes 1-2 -- disc. 2. Episodes 3-4 -- disc. 3. Episodes 5-6.