In real life Klaus Kinski was more of a nutter than most of the characters he played - read his demented autobiography Kinski Uncut if you need proof of that! (it reads more like a porno than a star memoir) - and on the set of this film he seemingly started six fistfights by day three of shooting, leading to the producer looking into having him murdered for the insurance money! Anyway, despite his deranged personality, Kinski is always a great actor to watch and here he plays a twisted landlord who rents out rooms to young women who he then watches from a series of crawlspaces he has built into the house. Add to that, he has a Nazi fixation, home-made death traps and an emaciated victim imprisoned in a cage. It all adds up to a pretty effective thriller/horror.