The movie was filled with suspense and all of the actors were excellent - especially Dennis Quad who played the psycho role perfectly throughout the movie. Yes, there were times that a reasonable person would ask why the attractive wife kept letting Charlie back into the house instead of calling the cops but it was still a very good movie to watch. Charlie's underground bunker reminded me of the 1970s movie called "Bad Ronald" in which a teenage boy accidentally kills a younger teenage girl in the neighborhood and his mother protects him from the cops by building a secret room in their house for him to hide in. The mother dies during a routine operation and the house is eventually sold but he remains living in the secret room and the new owners do not know he is hiding in their house until one night when he fails to plug the peep-hole and the light in the secret room shines thru the peep hole into the dark living room. The new owner's daughter sees this light in the wall, walks over and looks through the hole, and she then sees him and the secret room - at which point he busts thru the wall and runs out of the house. Now that plot was even more ridiculous because what person stays living in a secret room for years except a prisoner who is in a prison cell? Not every thing in the movie makes perfect sense but I still give this movie 4 stars because it was still a very good suspenseful movie and the acting was excellent.