Edward Ludwig
Director
David Duncan
Screenplay
Paul Yawitz
Story
Robert Blees
Screenplay
Willis H. O'Brien
Visual Effects
Lionel Lindon
Director of Photography
Willis H. O'Brien
Special Effects Supervisor
Edward Fitzgerald
Art Direction
Wah Chang
Creature Design
Paul Sawtell
Original Music Composer
Pete Peterson
Animation
Jack Dietz
Producer
Frank Melford
Producer
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)
