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Episode complete credited cast: | |||
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John Paul | ... |
Dr. Spencer Quist
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Simon Oates | ... |
Dr. John Ridge
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John Nolan | ... |
Geoff Hardcastle
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Jean Trend | ... |
Dr. Fay Chantry
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Joby Blanshard | ... |
Colin Bradley
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Vivien Sherrard | ... |
Barbara Mason
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Glyn Owen | ... |
'Griff' Griffiths
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Stephanie Bidmead | ... |
Janine Griffiths
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John Savident | ... |
Minister
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Michael Elwyn | ... |
Richard Duncan
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Anthony Newlands | ... |
Dr. George
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John Lee | ... |
Jenson
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Walter Horsbrugh | ... |
Dr. Seaton
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Desmond Cullum-Jones | ... |
Patterson
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What appears to be a Yellow Fever epidemic breaks out at an exclusive health clinic on one of the Scilly Isles. After the island is sealed off from visitors and any possible mosquitoes exterminated, Doomwatch is granted permission to investigate, but Quist's team soon discovers that the illness is actually a mutated new virus. It seems that an experiment into vaccines has gone wildly out of control, and hundreds of spiders are now carrying a deadly new disease.