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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 |
Robert Powell | ... | Tobias Wren | |
Joby Blanshard | ... | Colin Bradley | |
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Wendy Hall | ... | Pat Hunnisett |
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Penelope Lee | ... | Dr. Mary Bryant |
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Hamilton Dyce | ... | Minister |
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Robert Sansom | ... | Dr. Hugh Preston |
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Eileen Helsby | ... | Joyce Chambers |
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Ray Roberts | ... | Fred Chambers |
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Stephen Dudley | ... | Small Boy |
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John Berryman | ... | Reporter |
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Marcelle Samett | ... | Nurse |
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Ian Elliot | ... | Ambulance Driver (as Ian Elliott) |
Doomwatch are alerted to reports of a number of attacks on humans by rats. Toby and Bradley investigate the house of Mr. and Mrs. Chambers, victims of a recent attack; the two scientists lay traps in the kitchen, but the rodents display unusual intelligence by jamming the traps open using cutlery found on a worktop, and then viciously attack the men. Meanwhile, Ridge becomes involved with Doctor Mary Bryant, who has been conducting experiments on a group of rats in a room in her flat - but the rats have managed to escape, and have now turned carnivorous.