Island of the Fishmen (L'isola degli uomini pesce) is a 1979 Italian adventure action horror film directed by Sergio Martino.
After being acquired by American distributors, a new opening for the film was written and shot. This footage contained grisly special make-up effects created by Chris Walas. Changes to the film itself included the addition of musical cues by Sandy Berman not present in the Italian cut, a new English dub track and a new title, Something Waits in the Dark.
After this 1980 release proved unsuccessful, Jim Wynorski spearheaded New World Pictures' re-release of the film. Wynorski retitled the film (again) and for this new version, entitled Screamers, a scene of a man being turned inside-out was filmed specifically for inclusion in a trailer designed to lure in audiences who failed to give Something Waits in the Dark much notice.
Upon its release in June 1981, Screamers performed well for its releasing company but when moviegoers complained that the gruesome "man turned inside-out" scene was not included in the actual release, prints were sent back to New World to have the demanded scene spliced in. This sequence has never been seen on home video as it was not part of the original negative.
Both Something Waits in the Dark and Screamers run approximately 85 minutes in length. Roughly half an hour of footage was excised from L'isola degli uomini pesce in order to make room for the stateside additions.
Leave it to UK's Channel Four to keep providing quality documentaries. This dates back to 1999, but I'm just discovering it now. Here's the playlist of the whole 12 episodes, starting with the films of established auteurs like Jean Rollin and Jess Franco, then moving on to more obscure genres from France, Spain and elsewhere. Of particular interest to me is the third installment (Italian Horror of the 60's-70's) and episode 12 (a profile of the tremendously talented and intelligent Michael Reeves, who made his final film, Witchfinder General, at the age of 25 before his death).