 George Baxt says Hammer paid him £1,000 just for the title and that was his only contribution.Production began on August 9, 1971.First-time director Robert Young was unfamiliar with Hammer's tight production schedules, and at one point used up some 500 feet of film stock while trying to get a tiger to sink its teeth into a fake human arm stuffed with pork (it finally bit after beef was substituted).