This is one of those horror films thats more thought provoking than scary and that was one of the best things about these films from Hammer studios. Story has Victor Frankenstein (Peter Cushing) being saved at the guillotine and popping up in Carlsbruch as Dr. Stein. The other doctors in the area are always talking about this mysterious doctor and one young doctor named Hans Kleve (Francis Matthews) discovers who he really is and wants to help him in his future experiments. They take the brain out of a deformed dwarf named Karl and put it into a body that was built by Dr. Stein and the operation seems to go well. Karl is healing well and responding to everything okay but he doesn't want to be a medical spectacle for everyone to gawk at so he convinces a woman named Margaret (Eunice Gayson) who works there to loosen his straps and he climbs out the window. One of the side effects of the transplant is cannibalism and he has a hunger for flesh. Also, Karls brain is telling him he is deformed so the rest of his body begins to change! This is one of the few films that Cushing made for Hammer studios that didn't have Christopher Lee in the cast as well. The sets look great as they always do and it really captures the look of what this part of Europe must have looked like back then. The best thing about this film is the story. After they transfer the brain from one body to another the brain tells the new body its deformed and it reminded me that this aspect of the Frankenstein story was dwelled on only rarely. There is some horrifying moments during this film but its really a science fiction story with the emphasis on science. Great atmosphere and solid performances add to this overlooked Frankenstein entry. Also, veteran character actor Lionel Jeffries plays a grave digger! Well worth a look.