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.
- Scene 107
Menzies reveals that he placed Cairncross as a spy and threatens Turing into sharing secrets, making the cost of the intelligence operation personal.
- Scene 109
Turing cruelly denies caring for Joan to drive her away; she rejects the lie, refuses to leave the work, and throws her ring at him.
- Just before
- Scene 112
Archival images show the costly Sicily campaign and the Normandy landing while Turing credits Ultra intelligence with enabling major victories.
- Scene 113
Hugh and Peter decode messages showing two British ships at risk; the team prepares an analysis to decide which one can be protected without exposing Ultra.
- Scene 114
Menzies and MI-6 review Turing’s casualty and detection analysis and telephone Churchill’s office to direct military action.
- Scene 115
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