Watch Tinker, Tailor, Soldier, Spy

Tinker Tailor Soldier Spy is a movie set in the height of the Cold War when British Intelligence, otherwise known as MI6 or “The Circus”; discovers that it has been compromised. A long-term mole had managed to work their way into a senior role in its Secret Intelligence Agency (SIS). In response, the civil servant in charge of intelligence recalls retired lieutenant and veteran spy, George Smiley, out of retirement to have him make an attempt at uncover and track the double agent. Smiley recruits a few other men that he trusts to help him in this matter.

What results is a stew of paranoia, espionage and fear known as operation “Witchcraft”: A program that Smiley doesn't completely trust; his own investigation resulting in discovering the involvement of agents of the Soviet Union and a woman he may have been in love with.