From Hammer, who around this time made a series of psychological thrillers, to try and get away from the gothic horrors they were becoming renowned for. This one was directed by Freddie Francis, (Paranoiac (1963), The Evil of Frankenstein (1964) and Dracula Has Risen from the Grave (1968)) and produced and written by Hammer veteran Jimmy Sangster. It's a very stylish and compelling thriller, done with panache. It has American Chris Smith (Robert Webber) who was found on the side of the road after a bad car accident, and is suffering a nasty case of amnesia. He has been having sessions with Dr. Keller (Anthony Newlands) to try and see if he can remember anything, but with no luck. Chris only has one clue, a photograph of model Denise James (Lelia Goldoni), but private investigator Hemmings (Maurice Denham) is having no luck finding her. But a mysterious benefactor has given Chris a luxury penthouse apartment to live in, although Chris seems to be hearing noises coming from next door, even though the flat next door is unoccupied and derelict... It's a good thriller, and it does have a very jazzy flavour to it, it's a different kind of Hammer film, and their thrillers certainly had more style. However, Hammer have blood on display in this one, and a few cheeky references to Psycho (1960) along the way. But this manages to be complex and a very engaging film.