Part Two of the Exercise in Horror from Arch Oboler. The first story is called 'A Day at the Dentist'. The patient's name is Fred Houseman, and he's the last patient of the day. He's there for a simple toothache - but what he doesn't know, is that the dentist is the husband of an old 'conquest' who he hurt badly in the past. It's safe to say that his toothache is now the least of his worries, after being strapped down to the dentist's chair!