powered by AFI
The working title of this film was Beyond the Fog. Fredric Abbot's name is mispelled in the opening credits as "Abbott." The print viewed was a video re-release bearing the original British title, Tower of Evil. The British version of the film was 88-89 minutes in length, while the American release ran 85-86 minutes. As noted in the onscreen credits, Horror on Snape Island, which was a co-production between The Fanfare Corporation, an American company, and Grenadier Films., Ltd., a British company, was shot on location at Shepperton Studios, England.