The Black Sleep
In 19th century England, a noted brain surgeon rescues a former student from being hanged on a false conviction for murder, and spirits him away to an ancient, repurposed abbey far in the countryside. There, he connives his pupil into assisting him in mapping the functions of the various parts of the human brain, using living subjects who are under a terrible animation-suspending drug called "black sleep". Subsequently, the student, along with the daughter of one of the subjects, discover that most of these subjects have survived but are being kept in a dungeon-like cellar, in various stages of physical and mental derangement...In 19th century England, a noted brain surgeon rescues a former student from being hanged on a false conviction for murder, and spirits him away to an ancient, repurposed abbey far in the countryside. There, he connives his p... Read more
Starring Basil Rathbone, Herbert Rudley, Patricia Blair, Akim Tamiroff, Phyllis Stanley, Lon Chaney Jr., Bela Lugosi, John Carradine, George Sawaya, Tor Johnson
Watch "The Black Sleep" on Tubi TV released in 1956. It's a science-fiction and horror movie, and has a rating of 6 out of 10 from Imdb which is fairly okay for this kind of movie, and is currently available to watch for free.