Doomwatch (1972)

Doomwatch
Horror, Science Fiction
The waters surrounding an island become contaminated by chemical dumping, and people who eat fish caught in those waters become deformed and violent.
Starring
Ian Bannen, Judy Geeson, John Paul, George Sanders, Simon Oates, Jean Trend, Joby Blanshard, Percy Herbert, Shelagh Fraser, Geoffrey Keen
Directed By
Peter Sasdy