Granted, it’s not a horror film. In fact, it’s sci-fi/crime if anything because of the surgery involved. Surgery? Why yes. Karloff plays a doctor who performs surgery on a friend to save his life. Brain surgery. As in brain bit transplants. And while the donor brain in question wasn’t, shall we say, in a jar marked “Abby Normal,” it did belong to a gangster. So now the friend is acting verrry strangely.
The friend is not Bela Lugosi but Stanley Ridges. Lugosi plays a minor role as another gangster. Is it odd to hear a gangster with Lugosi’s accent? A bit, yes. Do we care, since we’re looking at a trailer with Karloff and Lugosi? Not really (although they don’t actually appear together in the film–but again, so what?). Enjoy!