Volcanic activity frees giant scorpions from the earth who wreak havoc in the rural countryside and eventually threaten Mexico City.
Richard Denning
as Hank Scott
Mara Corday
as Teresa Alvarez
Carlos Rivas
as Artur Ramos
Mario Navarro
as Juanito
Carlos Múzquiz
as Dr. Velazco
Pascual García Peña
as José de la Cruz
Fanny Schiller
as Florentina
Arturo Martínez
as Major Cosio
Pedro Galván
as Father Delgado
José Chávez
as Train conductor (uncredited)
Manuel Sánchez Navarro
as Victor Steven (uncredited)
Roberto Contreras
as Chumacho (uncredited)
