 She would later say that filming her death scene was tremendously frightening as it required her to have a small amount of explosive placed on the back of her head.The role of Inspector Daniele Soavi was played by the character's namesake, Argento's long-time collaborator Michele Soavi, in an uncredited role.This was the final film of actor Ian Charleson, who tested positive for HIV after a minor car accident, something which he had suspected for several months.