“They Live Inside Us” (*1/2 out of four) was a lackluster horror melodrama about a writer (James Morris) who seeks inspiration for his new book by staying in a haunted house but soon realizes this was a very bad idea and he is subject to all kinds of hallucinations and visions of real horror. You keep thinking something significant will happen but nothing does, as film drags and plods and is grim in the extreme. “House” told virtually the same story back in 1985 with a lot more scares and style.