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Wrestler vs mad-scientist with werewolf serum.
Chano Urueta
Luis Enrique Vergara
Blue Demon (as Blue Demon)
Prof. Lauro Carral
Wrestler (as Nathanael León Moreno)
Dr. Gruber
El Sanguinario
Inspector
Marina Gruber
Waitress
Prof. Rafael
Ursus (as Guillermo Hernández 'Lobo Negro')
Woman in Forest (as Ivonne Gobea)
Man in Forest
