A spin-off from the modish ecological BBC TV series - a more fact-based version of The X-Files - this mystery thriller crash-landed unhappily in the swamp of horror instead of on the firmer ground of science fact or fiction. John Paul, Ian Bannen and Judy Geeson look suitably intense as an investigation into the effects of a sunken oil tanker on the inhabitants of an island off the Cornish coast uncovers something nastily mutated in the biological woodshed. It's risibly alarmist, certainly, but the environmental dangers it pinpoints are only too topical.

The waters surrounding an island become contaminated by chemical dumping, and people who eat fish caught in those waters become deformed and violent.