Aliens from a dying world plot to conquer earth by preying on man's superstitions. Bringing two dead scientists back to life, they use their knowledge to re-animate various earth monsters, including the werewolf, Frankenstein's monster, the mummy Tao-Tet, and the vampire Count de Meirhoff.
Michael Rennie
Dr. Odo Warnoff
Karin Dor
Maleva Kerstein
Craig Hill
Insp. Toberman
Patty Shepard
Ilsa Sternberg
Ángel del Pozo
Dr. Kerian
Paul Naschy
Waldemar Daninsky
Manuel de Blas
Count Janos de Mialhoff
Ferdinando Murolo
Frankenstein Monster
