"I, Monster" is a respectable adaptation of the classic Robert Louis Stevenson tale of Jekyll & Hyde, albeit with some unconventional touches by screenwriter Milton Subotsky. Sir Christopher Lee stars as Dr. Marlowe, a psychiatrist / researcher who experiments with drugs, trying to get his patients to release their inhibitions. But when he tests his serum on himself, the results are predictable enough. He becomes an unhinged alter ego named Edward Blake, who indulges in debauched and nasty acts for their own sake. Meanwhile, Marlowes' lawyer Utterson (Peter Cushing) believes Marlowe and Blake to be two different people and thinks that the Blake character is blackmailing Marlowe.
While this slight film doesn't have quite enough style or gravitas to rate as anything more than routine entertainment, it's still reasonably well done. Produced by horror greats Amicus, its period recreation is decent, and its atmosphere likewise effective. Subotsky's touches include having Marlowe be a follower of Freud, so there are Freudian overtones, and the topic of the role that drugs play - or shouldn't play - in the treatment of patients. It does have the time honored appeal of any story with a Frankenstein type mad doctor twist. The makeup by Harry and Peter Frampton is pretty good, but the amount used on Lee is increased bit by bit on screen rather than utilized all at once. The music by Carl Davis is good. As directed by Stephen Weeks, a 22 year old budding filmmaker hired by Amicus at Lees' suggestion, it's actually not terribly violent - or as sexy as the stuff churned out by Hammer during this period. Much of the budget went towards an unusual 3D process exploiting the Pulfrich effect (which explains the camera movement), one that wasn't exactly pleasant to film for Lee.
As can be expected, the consistent professionalism and commitment to character by the two stars makes it all worthwhile. They're ably supported by exemplary actors such as Mike Raven, Richard Hurndall, George Merritt, and Kenneth J. Warren. That's a young Michael Des Barres as the youth who accosts Blake in the alley.
Agreeable entertainment, overall, although the ending is rather abrupt.
Six out of 10.
