This film is an all-time classic shocker for its time I remember seeing this movie with my brother and some of his friends when I was 7 years old. BIG mistake. It left quite an impact on me at the time. Very reluctantly, 51 years later, I caught it again on Turner Classic Movies and it seemed like yesterday, I got the scares all over again and had nightmares all week long. Basil Rathbone, in all his usual and nefarious greatness, plays a neurosurgeon who is determined on finding a way to cure his comatose wife of her brain tumor. With the assistance of an equally nefarious surgeon, he conducts surgical experiments on the brains of living, breathing and unwilling subjects with the help of a drug called "the black sleep" which renders them unconscious long enough for him to do his dirty work, if they're so lucky to survive the surgery.
***Spoiler*** And dirty work it is, I must say. For its time, the graphic nature of the brain surgery scene (especially the one on the sailor, played by George Sawaya), left nothing to the imagination. You can actually see Rathbone performing surgery on Sawaya's (dummy) head, (like they do on Nip/Tuck and other medical shows), and what's supposed to be CSF fluid drains from the area. No blood, just a watery substance that literally oozes from the tissue as it's handled. It's nasty, folks, and you feel every single cut, twist, squeeze and probe that the scene offers. You will definitely squirm in your seat! It's been said that Rathbone was directed by a real-life Hollywood neurosurgeon as to what to do in this scene. In Rathbone's website you can see the dummy head in one of the behind-the-scenes photographs. But enough of the gross-out stuff.
The horror comes at you from all sides and from all the characters - Tor Johnson with no eyeballs, Deranged John Carradine with his very deranged plan of escape, the female subject (she just appears out of nowhere and her make up is very effective with what appeared to me to be half of a head), Akim Tamiroff as the "Igor" to Dr. Cadman's "Frankenstein," and good old Lon Chaney, Jr. at his usually twisted best as the one character for whom you really feel sorry for (he played a lot of these, didn't he?) although he tries to beat the crap out of Tor Johnson and vice versa then you don't know who to feel sorry for because Tor's character was an innocent, too. Lots of action there. Even the sets, the lighting, the sound effects, the music - like the Universal horror films of the 1940s, this is very atmospheric and will scare the s*** out of you. I just wouldn't advise eating while you watch it.