If you loved Island of Lost Souls, try The Ghost of Frankenstein
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.
What they share
Both films are directed by Erle C. Kenton, and they sit in Horror / Science Fiction territory. If that's the register that drew you to Island of Lost Souls, the second film will land in a comparable space — through a different lens.
What The Ghost of Frankenstein is
Vasaria, years later. Winter lightning. A single rusted weathercock. Ygor seeks out the last son of the late Baron, hoping to revive the monster. Dr. Bohmer has other plans: world domination via brain transplant. Classic monster rally veers into mad-scientist shenanigans.

