Doomwatch (US title: Island of the Ghouls) is a 1972 science fiction/thriller film directed by Peter Sasdy. The film is based on the BBC series Doomwatch. The screenplay was written by Clive Exton.
The waters surrounding an island become contaminated by chemical dumping, and people who eat fish caught in those waters become deformed and violent.
An outsider visits a remote isolated village that has seemingly shunned the modern life. Doctor Del Shaw, an investigator from the British ecological watchdog group nicknamed Doomwatch, is sent to the island of Balfe, to file a report on the effects of a recent oil tanker spill. He becomes fascinated with the mysterious behavioural disorders of the locals who display rudeness and random aggression and a strange genetic prevalence of thick lips and sloping brows. Investigation shows that the villagers have been suffering over a prolonged period from hormonal disorders, which are being caused by leaking drums of growth stimulants that have been dumped offshore. The islanders have been eating contaminated fish and develop a disorder of excessive hormonal growth, which produces aggression and eventually madness, attributed to a form of acromegaly. Rather than seek help from the mainland they hide those who are deformed from any newcomers.
Rising up from the ashes of their own broken dreams
To carry on their laws of hate as their doctrine deems
Continuing their terror-reign extermination rites
Seeking out greater goals even though they've lost the fight
The twisted cross is still alive
Fitting of a heart so black the south they dwell
Tropical heat so hot as if to thrive in Hell
Corrupt aristocrats make their paradise
Forgetting past atrocities, mankind's sacrifice
The Fourth Reich, Growing stronger
Silent beast stalking life, Nazi's silent march
Always scoffing, laughing at the world's vain search
Continuing their terror reign extermination rites
Seeking out greater goals even though they've lost the fight