Beginning is a bit like "The Man They Could Not Hang"--innocent man condemned to death is spared by his doctor friend. It also is a bit like "The Man Who Lived Again"--both are Boris Karloff films from the 1930s. So, if you have a sense of déjà vu, this might be why.

The film stars Basil Rathbone and Herbert Rudley. Rudley has been falsely accused of murder and is about to be executed. His 'friend', Rathbone, gives him a potion to make him appear dead--then instead of burying him, Rathbone will use him as an assistant in his brain research. What Rudley doesn't realize is that this research is being done on live humans--humans that Rathbone renders unconscious with his 'black sleep' formula. Unfortunately, Rathbone's plans for Rudley aren't all that altruistic--tune in and find the evil truth.

This film has lots of appearances very horror notables--though most are not very satisfying, as their roles were very, very small. Along for the ride are Akim Tamiroff in a very creepy role--and the most complex of the guest stars. As for Lon Chaney, Jr. and Bela Lugosi, both have thankless non-speaking roles and are rather wasted. And, out of the blue, John Carradine appears near the end of the film...and then overacts wildly. And, along for the ride with him is Tor Johnson--of Ed Wood fame. I liked seeing all these guys--I just wish the script had given them more to say and do. It's like a great opportunity somewhat squandered.

The film is entertaining--mostly because the plot is quite good and has a few nice twists. Unfortunately, however, there are also some moments with LOTS of cheese--most notably Carradine's bizarre performance. But the good well outweighs the bad and is fun.

Oddly enough The Black Sleep was some years ahead of its time medically speaking. The title refers to a drug from India that scientists Basil Rathbone uses to do that. Today it's a technique to enable recovery from certain illnesses or injuries. But being that this is Basil Rathbone mad scientist you know the drug will be used for all kinds of nefarious purposes.

Rathbone gets Dr. Herbert Rudley out of prison to assist him by use of his coma inducing Black Sleep. Rudley is in prison for a murder he didn't commit. When he 'dies' before the death sentence is carried out that's the end of it. But Rathbone has a lot of work for Rudley to do, operations on some willing and not so willing patients. What it's all about you have to see The Black Sleep for.

If you do see it you're in for a treat because with a cast of scene stealing actors such as Bela Lugosi, Lon Chaney, Jr., and John Carradine, this is not to be missed. All three of their characters are products of Rathbone's failed experiments. Carradine in particular is joy. He plays a deranged man who thinks he's a Crusader King and he's overacting outrageously and I'm loving every minute of it. Also in the film is Akim Tamiroff as a gypsy grave robber who also aids Rathbone.

All these people have legions of fans still. So if you want to see a film that's a combination of Frankenstein and the Island of Dr. Moreau with a great cast you can't miss with The Black Sleep.

It's 1872 London. Dr. Gordon Ramsey is soon to be executed in Newgate Prison. His mentor Sir Joel Cadmund rescues him with the use of an east Indian drug known as the Black Sleep. Cadmund has gone mad after his wife fell into a coma due to a tumor. He needs Ramsey's assistance in experimenting on live brains and performing brain surgery on his wife once they have perfected their technique.

I want Ramsey to be younger and more wide-eyed. Herbert Rudley was a veteran actor in his 40's. It's understandable for a learning surgeon but he needs to be completely under Cadmund's spell. It would work better with a more innocent lackey. Also the audience would better believe his innocence for his crime. That would be very useful. Rudley is playing it with too much self-righteousness when he discovers that the victims are alive. It works better if he's younger with less agency. He could submit to Cadmund's authority until he can do it no more. That's the better narrative. This movie doesn't have quite as much character growth and the promising premise starts to stagnate. The creatures in the dungeon are both great and silly. It's an interesting B-movie.