This film is what I call "basic" - meaning not a lot to it. Doctor Sartorius (Karloff) is a "mad doctor" who's lost all his funding, Yvonne Clifford (Mona Goya) is married to a rich man while having an affair with man with not a lot of money. So she enlists the help of Dr. Sartorius to bump off her husband but there is one problem - the nurse.
If you like Boris Karloff then this film is worth watching otherwise you can pass this one by - you are not missing anything. It's not a terrible film but it's not a great film - I put it in the so-so category.
When you read reviews of this film you will find that reviewers talking about Mona Goya's performance being bad - and it's true she is not very good in this movie. Very much over acting in this film but she does not take away from Karloff's performance.
5/10