Maniac is one of the lesser known of Hammer's "psychological thrillers" made in black and white around the 1960's. It's not fiendishly clever enough to be really memorable but it does have a few interesting twists. Basically the plot sees Kerwin Mathews stranded in a small French town where he books into a hotel and starts to feel attracted to the owners sexy young step-daughter. Soon after this, he also starts feeling attracted to the more mature but still sexy step-mother as well! Apart form this love triangle, there is a further problem, in that the missing family member in this scenario is the father, who is currently locked up in an asylum for a violent blow-torch murder committed years ago
now but he wants out, and our hero is about to be roped into aiding in his escape! The film doesn't hang together very well for the beginning hour or so, sadly mainly due to Kerwin Mathews' wooden performance. Seeing him flirt with the daughter and then casually drop her and turn to her mother left me feeling quite disconnected from the plot as I found him a very unlikeable character. However when the plot to spring the insane killer gets going, things get to be more fun, and its after this point that a few nice twists start being revealed. I didn't guess the ending, which I am glad to say.
The movie is nicely shot, and makes a lot of use of it's location, with some very nice location filming, especially a very odd ruin/cave which features in the finale. Although why it's set in France at all is of no consequence, they really could have used the exact same plot and just stayed put in England. Anyway it's nice to see these old movies again, and luckily this is out on DVD. It's worth a look.