A man and his sister buy an old dilapidated house. They (and a mutual friend on a visit) are stalked by the previous owner; A creepy lunatic who had just escaped a mental asylum.
A scientist claims that he was accosted by spirits from another dimension in a Library's reading room. When he and a police officer return to the room, they are abducted.
A claustrophobic man is stalked in a small dark room by his ex partner who he stole money from. He can't handle the tight darkness around him, but if he turns on the light, he'll be seen by his stalker.