Story Structure — 4 Plot Phases
The Impossible Return
HMS Scorpion surfaces in 1981 after vanishing in WWII. British intelligence investigates the perfectly preserved hull and recruits survivor Jack Hardy alongside designer Alan Cassidy.
Key Events
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Soviet Freighter Encounter — The missing WWII submarine surfaces in the path of a Soviet freighter in 1981. Characters: Jack Hardy
Location: Baltic Sea
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Vessel Returned to British — Soviets return the preserved vessel to British authorities for investigation. Characters: Jack Hardy
Location: Naval Base
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Naval Intelligence Investigation — Investigators find the vessel perfectly preserved but completely empty of crew. Characters: Jack Hardy
Location: HMS Scorpion Hull
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Hatch Opens Anomalously — The submarine opens its own hatch, inviting the investigating team aboard. Characters: Jack Hardy
Location: HMS Scorpion Deck
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Hardy and Cassidy Join Mission — The sole survivor and the vessel's designer enlist to retrace the submarine's final days. Characters: Jack Hardy, Cassidy
Location: Naval Recruitment Office
Descent into Anomaly
The mission enters Soviet waters, triggering temporal distortions that cause the crew to adopt dead identities. Contact is lost, and a false enemy is destroyed, revealing past and present are merging.
Key Events
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Hardy and Cassidy Join Mission — The sole survivor and the vessel's designer enlist to retrace the submarine's final days. Characters: Jack Hardy, Cassidy
Location: Naval Recruitment Office
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Mission Departs — The modern crew sets sail under Travis's command and Byrnes's navigation. Characters: Jack Hardy, Captain Byrnes, Cassidy, Travis
Location: Naval Harbor
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Entry into Soviet Waters — The submarine crosses into restricted Soviet territory to follow the 1943 route. Characters: Jack Hardy, Captain Byrnes, Cassidy, Travis
Location: Baltic Sea Border
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Crew Identity Absorption — The modern crew begins adopting the personalities and identities of the dead 1943 crew. Characters: Jack Hardy, Captain Byrnes, Cassidy, Travis
Location: HMS Scorpion Interior
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Contact with Oakland Lost — Communication with the escort ship HMS Oakland is abruptly severed. Characters: Jack Hardy, Captain Byrnes, Cassidy, Travis
Location: HMS Scorpion Bridge
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False Soviet Submarine Destroyed — A communication error leads the crew to destroy a detected Soviet submarine. Characters: Jack Hardy, Captain Byrnes, Cassidy, Travis
Location: Baltic Sea Depths
Command Fracture
Practice torpedoes become live weapons, and Captain Byrnes attempts to abort the mission. Travis overrides him, WWII aircraft attack, and Travis murders Byrnes to seize control.
Key Events
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False Soviet Submarine Destroyed — A communication error leads the crew to destroy a detected Soviet submarine. Characters: Jack Hardy, Captain Byrnes, Cassidy, Travis
Location: Baltic Sea Depths
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No Debris Found — Hardy realizes the destroyed vessel matches the exact location and time of a 1943 engagement. Characters: Jack Hardy, Cassidy
Location: HMS Scorpion Deck
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Torpedoes Become Live — Cassidy discovers that the practice torpedoes have transformed into functional live weapons. Characters: Cassidy
Location: HMS Scorpion Torpedo Room
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Abort Attempt Fails — Byrnes tries to abort the mission, but Travis convinces him to continue. Characters: Captain Byrnes, Travis
Location: HMS Scorpion Bridge
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WWII Luftwaffe Attack — Three Second World War fighters appear on radar and strafe the surfaced submarine. Characters: Jack Hardy, Captain Byrnes, Cassidy, Travis
Location: HMS Scorpion Tower
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Byrnes Murdered — Travis holds Byrnes at gunpoint and kills him to seize full command. Characters: Captain Byrnes, Travis
Location: HMS Scorpion Interior
Temporal Collapse
Travis becomes possessed by the original captain and targets the Soviet fleet. Hardy evacuates the crew, sabotages the torpedoes, and dies as the submarine sinks, erasing the incident from history.
Key Events
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Byrnes Murdered — Travis holds Byrnes at gunpoint and kills him to seize full command. Characters: Captain Byrnes, Travis
Location: HMS Scorpion Interior
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Travis Possessed — Travis appears possessed by the original submarine captain and takes absolute control. Characters: Jack Hardy, Cassidy, Travis
Location: HMS Scorpion Bridge
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Soviet Nuclear Alert — Modern Soviet officers detect the vessel and begin preparations for nuclear war. Characters: Jack Hardy, Cassidy
Location: HMS Scorpion Bridge
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Crew Evacuation — Hardy successfully gets the remaining crew off the boat before the attack begins. Characters: Jack Hardy, Cassidy
Location: HMS Scorpion Exterior
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Travis Attacks Fleet — Travis and the submarine, fused as one entity, launch an attack on the Soviet fleet. Characters: Travis
Location: Königsberg Harbour
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Torpedo Sabotage — Hardy rewires the torpedo control system to force an internal detonation. Characters: Jack Hardy
Location: HMS Scorpion Torpedo Room
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Submarine Destruction — Torpedoes explode inside the tubes, killing Travis and causing the vessel to sink. Characters: Jack Hardy, Travis
Location: HMS Scorpion Interior
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Hardy's Death — Hardy dies on his bunk clutching a picture of his wife as water engulfs him. Characters: Jack Hardy
Location: HMS Scorpion Bunk
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Historical Cover-Up — Soviets find the decaying wreck, and both British and Soviet authorities close the files. Characters: Jack Hardy
Location: Soviet Naval Base
Jack Hardy is the sole survivor of a mysterious submarine disaster in World War II. Now, in 1981, the ill-fated submarine Scorpion has resurfaced, miraculously intact. Naval Intelligence need Hardy's expertise to retrace the course and mission that led to her original disappearance. But what's waiting for them under the grey waters of the Baltic Sea turns out to be much worse than the Russian submarines they're expecting. Wherever Scorpion has been all this time, it's brought some very bad luck back with it... 2 part tv special