Doomwatch (U.S. title: Island of the Ghouls) is a 1972 British science fiction film directed by Peter Sasdy and starring Ian Bannen, Judy Geeson and John Paul.

Dr. 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 spillage.

The Monthly Film Bulletin wrote, "After a promising opening [...] the weak, science-based story-line is embellished by Gothic horror elements which serve only to vitiate the authenticity that was the chief strength of the otherwise glossy TV series.

The Gothic exaggerations and the scientific revelations never really cohere, and for all the topicality of the plot, Sasdy's film proves equally unconvincing as ecological exposé or contemporary horror show.

"[2] In a retrospective review for Radio Times, Tom Hutchinson awarded the film two stars out of five, writing "this mystery thriller crash-landed unhappily in the swamp of horror instead of on the firmer ground of science fact or fiction [...] It's risibly alarmist, certainly, but the environmental dangers it pinpoints are only too topical.