There's a lot of commentary on this film here; however, I want to draw attention to the use of dream structure in this movie. People that appeared normal to the victims at first are suddenly balding, idiotic savages. A man looks to a policeman for aid and the audience suddenly notices that his face is not entirely real. The experiences of the victim of Lionheart (Price's character in this movie) each resemble a dream suddenly turned nightmare. It was a very effective device for a horror movie.
Review of Theater of Blood
