A scientist moves into Dr. Frankenstein's castle to set up his experimental growth ray. He is arrested by the villagers, leaving his experiment to grow out of control.; Dragoom, a flaming monster from the planet Vulcan, arrives on Earth and terrorizes the planet. The military are helpless before him, but a monster movie director fools him into fleeing by using special effects to fake the arrival of police from Vulcan in pursuit of Dragoom.; A popular adventure writer finds a giant mud creature from another planet stranded in a Brazilian swamp. The alien tricks him into bringing all Earth's scientific records for nefarious purposes, but is destroyed by an H-bomb hidden with the records.