My pick is Tinker Tailor Soldier Spy . It was released in 2011. Tinker Tailor Soldier Spy is a British Cold War espionage thriller based on the novel by John le Carré. The story follows retired intelligence officer George Smiley, who is secretly called back to uncover a Soviet double agent inside MI6. As he investigates, he carefully pieces together hidden clues, betrayals, and secret identities within the British intelligence system. The film is known for its slow, intelligent storytelling, realistic spy work, and focus on psychological tension rather than action.