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A group of train passengers, including a policeman (Ian Hart) a wanted criminal (Mick Sizer) and an M.O.D. scientist (Harriet Ambrose) are travelling to Sheffield when their train crashes inside a tunnel and a strange gas envelopes them. When they awake, they find that Harriet froze them all so they could survive the giant meteor impact that destroyed the rest of the world. Now, they seem to be the only survivors of the human race in a world overrun with tropical plants and patrolled by packs of man-eating dogs.
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Episode 1
Government employee Harriet Ambrose is one of the passengers on a train from London to Sheffield but,unlike her fellow travellers,she is aware that a disaster is about to happen. It is a huge meteor that falls on Birmingham,destroying life for many miles around but,as the train crashes,Harriet discharges a gas canister. A long while later the passengers awake from a state of suspended animation to find the surrounding countryside wholly wasted. Harriet is anxious to locate a colleague,Jonathan Geddes,whom she believes can help and she persuades the others to help her find him.





