The first U.S. mission to Venus crash-lands off the coast of Sicily, unknowingly bringing back a mysterious reptilian creature that rapidly grows to a monstrous size.
In The Manster (1959) Sci-Fi, Horror, Movie an American journalist stationed in Japan is given a mysterious injection by a mad scientist, turning him into a murderous, two-headed monster.
A woman in a hypnotic state recounts to two doctors the details of a horrific experience from her past life that began with the mysterious and sudden disappearance of her husband.