Story Structure — 5 Plot Phases
The Weapon Revealed
German weapons development creates a growing threat through the V-1 and V-2 programs. Duncan Sandys accepts the evidence while Professor Lindemann disputes it, leading to the raid on Peenemünde.
Key Events
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V-1 Prototype Failure — Technical problems lead to a crewed version of the flying bomb, but its test pilots die.
Location: Nazi Germany
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Successful Prototype Flight — A successful test reveals that weight shifts and speed changes require trim-control adjustments.
Location: German flight-test site
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Threat Investigation Ordered — A senior British leader orders Duncan Sandys to investigate reports of a flying bomb. Characters: Duncan Sandys
Location: London
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Scientific Doubt — Sandys accepts the evidence, but Professor Lindemann dismisses the intelligence assessment. Characters: Duncan Sandys, Professor Lindemann
Location: British government offices
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Peenemünde Air Raid — Bomber Command attacks the rocket complex to disrupt German weapons development.
Location: Peenemünde
Into the Underground
After production moves underground, British intelligence prepares an infiltration operation using engineers with forged identities. Robert Henshaw is exposed and killed after refusing to reveal his mission.
Key Events
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Production Moves Underground — German production moves underground while development advances toward the more deadly V-2.
Location: Southern Germany
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Infiltration Plan Formed — British intelligence plans to infiltrate the underground factory using engineers who speak German or Dutch.
Location: British intelligence headquarters
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Agents Receive Identities — Selected volunteers receive the identities of dead men and are hastily trained for infiltration. Characters: Robert Henshaw
Location: British training facility
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Henshaw Is Arrested — Robert Henshaw is arrested after being linked to the dangerous identity he is using. Characters: Robert Henshaw
Location: Occupied Europe
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Henshaw Refuses Cooperation — Henshaw refuses to reveal his mission and is shot after declining to cooperate. Characters: Robert Henshaw
Location: German-controlled holding area
The Factory Within
The surviving infiltrators enter the underground factory and take technical and menial assignments. Meanwhile, V-1 and V-2 attacks intensify the pressure to destroy the facility.
Key Events
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Agents Reach Factory — The surviving infiltrators enter the underground facility under assumed identities.
Location: Underground rocket factory
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Factory Assignments — One infiltrator works as a porter while another is assigned to the technical heart of the project.
Location: Underground rocket factory
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V-1 Attacks London — V-1 weapons strike London, while forward defensive guns destroy some incoming bombs.
Location: London and southern England
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V-2 Attacks Begin — Undetectable mobile launches begin a more destructive V-2 bombardment of London.
Location: London
Opening the Target
The agents learn that a bombing raid can succeed only if the rocket launch doors are opened. They search for the correct powerhouse switch while factory security closes in.
Key Events
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Factory Must Be Destroyed — The agents conclude that destroying the underground factory is the only practical way to stop the attacks.
Location: Underground rocket factory
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Night Raid Discovered — The agents learn that a night raid is planned and that the launch doors must be opened as a target.
Location: Underground rocket factory
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Powerhouse Switch Searched — An infiltrator searches for the switch that will open the large rocket launch doors.
Location: Factory powerhouse
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Security Alarm Sounds — A security review exposes an identity mismatch, and the factory alarm is raised.
Location: Underground rocket factory
The Last Lever
An alarm exposes the infiltration and triggers a hostage confrontation in the powerhouse. The correct lever is pulled under fire, allowing the bombing raid to destroy the rocket facility.
Key Events
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Powerhouse Hostage Stand — One infiltrator seals himself inside the powerhouse and holds the staff hostage while searching for the correct switch.
Location: Factory powerhouse
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Final Switch Pulled — Under fire, the infiltrator receives instructions through the microphone and pulls the lever that opens the launch doors.
Location: Factory powerhouse
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Rocket Facility Destroyed — The rocket begins to launch as bombs explode and obliterate the facility.
Location: Underground rocket factory
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Mission Acknowledged — Duncan Sandys is congratulated, receives a ministerial promotion, and reflects on the agents' anonymity. Characters: Duncan Sandys
Location: London