At Bletchley Park, Alan Turing must persuade a skeptical team to build a machine that can break Enigma before the war is lost, while concealing the self the law condemns.
- Scenes 1–12
Turing is investigated as a guarded outsider in 1951, then enters Bletchley in 1939 looking for the puzzle he can solve.
- Scenes 13–30
He sees the scale of Enigma, believes a machine can solve it, and grows isolated from colleagues who make little progress.
- Scenes 31–50
Churchill’s order gives Turing authority and his half-built machine advances toward sustained work.
- Scenes 51–88
Joan joins the project; the team builds and tests the machine while Turing learns to rely on collaborators.
- Scenes 89–91
A first decrypt proves the machine works, and the team immediately faces the choice to let the Carlisle convoy be attacked.
- Just before
- Scene 97
WRENs collect the first messages of the day as Ultra grows into a vast store of military intelligence.
- Scene 98
Hugh feeds intercepted messages into Christopher and reads the day’s Enigma settings from its output.
- Scene 99
The team records decrypted messages in Ultra booklets; Peter knocks Turing’s papers to the floor, and Turing finds Cairncross’s Bible open to the verse used as the earlier cipher key, exposing John as the Soviet spy; John threatens to reveal Turing’s homosexuality if he reports him.
- Scene 100
This scene
