Thriller about disfigured inhabitants of a Cornish island. Ian Bannen, Judy Geeson. Dr. Quist: John Paul. Dr. Ridge: Simon Oates. Admiral: George Sanders. Hartwell: Percy Herbert. Sir Henry: Geoffrey Keen. Mrs. Straker: Shelagh Fraser. Vicar: Joseph O'Conor. Directed by Peter Sasdy.
Chemicals pollute the water, and as a result people become deformed mutants. Sanders is sent by the military to get to the bottom of the mystery and save the world from doom. Pretty standard thriller material based on a BBC television show.