A poisonous salamander is the source of doom for a sheik, a grand vizier and their mistress in old Arabia. Hundreds of years later the artefact comes back to life and goes after an old fool and his show girl hussy.
Professor Wilkins experiments on brains and keeps them alive after death. When he injects the brain of an octopus with his growth serum, the thing expands enormously and starts running amuck in the city. Wilkins can kill it by feeding him the poisoned corpse of a colleague.