Enigma

Enigma (2001) is a British wartime thriller you can watch online on iFILM, directed by Michael Apted from Tom Stoppard's screenplay based on Robert Harris's novel. Dougray Scott, Kate Winslet and Jeremy Northam lead the cast.

March 1943. The Germans reset the Enigma cipher keys overnight, blinding Allied intelligence to every U-boat signal in the North Atlantic. A convoy with ten thousand lives aboard is already at sea. Tom Jericho, a brilliant and recently broken mathematician, is pulled back to Bletchley Park with hours to spare. But Jericho is chasing two ciphers at once — the naval code and the sudden disappearance of a woman he loved, whose trail points to a mole inside the Park itself. His only ally is her flatmate Hester (Winslet), while counterintelligence officer Wigram closes in from behind.

The film earns its tension not from the cryptographic machinery but from the question of who in a building full of brilliant, frightened people can actually be trusted. Stream Enigma (2001) in full online on iFILM.