If you loved Son of Frankenstein, try The Invisible Ray
A bridge between a film you've already seen and one most people haven't. The Invisible Ray has roughly 4.5× fewer votes than Son of Frankenstein — it's a deeper cut, not a mainstream recommendation. Here's what they share, and what the second one does that the first one doesn't.
What they share
Theyboth carry the dread mood tag, and they sit in Horror / Science Fiction territory. If that's the register that drew you to Son of Frankenstein, the second film will land in a comparable space — through a different lens.
dread
What The Invisible Ray is
Carpathian Mountains winter darkness a lone Geiger counter ticking Dr Rukh's eyes gleam with obsessed intensity his body begins to deteriorate. Director Lambert Hillyer's precode era horror.

