Agents of a foreign power grab the wrong man when they attempt to kidnap a scientist working on a secret project. The man they took escaped from an asylum and he releases germs that turn his captors into apes.
A vampire's coffin is brought about a ship and when the crew mutinies under the cruel captain's treatment, they stake him and place his body in the coffin.
A killer hides in a water tank and when the train takes on engine water and drains the tank to halfway, the man can no longer latch on to the lid, eventually tires treading water and drowns.