La isla de los resucitados

A doctor (Roger Pryor) studying cryogenics visits the deserted home of Dr. Leon Kravaal (Boris Karloff), a pioneer in the field who went missing ten years before. Uncovering a secret passage in the basement, he and his nurse girlfriend (Jo Ann Sayers) find Kravaal and four other men frozen in ice. They successfully revive Kravaal, who then revives the others. It turns out Kravaal had frozen himself and the others years before when they tried to arrest him. So now the somewhat mad doctor holds them all hostage while he tries to recover his original formula.

Very interesting and entertaining Karloff mad scientist movie. The subject of cryogenics (never called that here, just frozen therapy) is ahead of its time. The rest of the cast is fine but obviously it's Karloff's show the whole way. Intriguing premise with fun execution. A solid "B" movie that's highly enjoyable.