Kenneth G. Crane

An American reporter in Japan is sent to interview an eccentric Japanese scientist working on bizarre experiments in his mountain laboratory. When the doctor realizes that the hapless correspondent is the perfect subject for his next experiment, he drugs the unfortunate man and injects him with a serum that gradually transforms him into a hideous, two-headed monster. (imdb)

Japanese villagers worship a monster and his son who live in an island cave. Some circus people hear about them, go to the island to capture the monster and wind up shooting its son. Then the trouble starts. (imdb)

The U.S. government is conducting experiements on the effects of exposure to space radiation by sending animals briefly into orbit. Following a malfunction, one of the rockets stays in space longer than planned, and is lost from the scientists' radar screens. Later, Dr. Brady, one of the rocket scientists, reads a news report about strange occurances in Central Africa... (imdb)

Near the end of the war, GI Steve Boland, a self-described "sharp-operator", meets a German girl, Ilsa, and they fall in love. Ilsa's brother Karl and his fellow-Nazi Ludwig visit Ilsa and announce they are "Werewolves", Nazi assassins parachuted behind Allied lines. She and Steve go to Army Intelligence with they information, where Steve is immediately arrest for being A.W.O.L.