Director Massimo Pupillo wasn't satisfied with the final result, and allowed producer Ralph Zucker to take the director's credit instead, even though Zucker hadn't directed any scenes. This has led people to confuse Pupillo and Zucker for one another.
In a taped radio interview, Massimo Pupillo said that Barbara Steele was difficult to work with for the first three or four days, acting like horror films were beneath her. He chewed her out one day in front of cast and crew. After that, he said, she was wonderful to work with.