Tinker Tailor Soldier Spy (1979)

John le Carré's seminal Cold War masterwork strips espionage of glamour, recasting intelligence work as an exercise in bureaucratic routine and institutional paranoia. Alec Guinness portrays George Smiley with exquisite, watchful stillness, piecing together a catastrophic breach through dusty committee minutes, civil service interviews, and coded diplomatic cables. It remains a peerless study of institutional decline, where the tensest moments occur over tea in drab Whitehall offices.