
Volcanic activity frees giant scorpions from the earth who wreak havoc in the rural countryside and eventually threaten Mexico City.
Cast

Richard Denning
Hank Scott

Mara Corday
Teresa Alvarez

Carlos Rivas
Artur Ramos
Mario Navarro
Juanito

Carlos Múzquiz
Dr. Velazco

Pascual García Peña
José de la Cruz

Fanny Schiller
Florentina

Arturo Martínez
Major Cosio
Pedro Galván
Father Delgado

José Chávez
Train conductor (uncredited)
Manuel Sánchez Navarro
Victor Steven (uncredited)

Roberto Contreras
Chumacho (uncredited)

Quintín Bulnes
Lineman killed on pole (uncredited)
Isabel Vázquez
Villager (uncredited)
Leonor Gómez
Villager (uncredited)

Bob Johnson
Narrator (voice) (uncredited)
Crew

Edward Ludwig
Director
David Duncan
Screenplay
Robert Blees
Screenplay
Paul Yawitz
Story
Lionel Lindon
Director of Photography
Frank Melford
Producer
Jack Dietz
Producer
Pete Peterson
Animation

Willis H. O'Brien
Special Effects Supervisor, Visual Effects
Paul Sawtell
Original Music Composer
Wah Chang
Creature Design
Edward Fitzgerald
Art Direction
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