Anton Diffring plays the definitive psycho-narcissist, using all those around him as pawns for his personal pleasures and goals. I saw this film on it's initial theatrical release in 1960. (As a young boy of 10,I recall,I was pleasantly shocked at seeing the scantily clad female circus performers!) And I now own the film on laserdisc. The suspense still holds up well, and though the violence is not as explicit as you find in today's horror films, it is still on the gruesome side. Call me sentimental, but I like the theme song that is sung during the performance of the circus's female headliner ("Look for a Star"). It is typical early 60's love song ala Frankie Avalon, but it is a pretty song inserted within all the gruesome murder and violence around it. Very effective if you think about it. My rating: 8 out of 10 stars.