"An American cowboy living in Mexico discovers his cattle is being eaten by a giant prehistoric dinosaur."
Guy Madison
as Jimmy Ryan
Patricia Medina
as Sarita
Carlos Rivas
as Felipe Sanchez
Mario Navarro
as Panchito
Pascual García Peña
as Pancho
Eduardo Noriega
as Enrique Rios
Julio Villarreal
as Don Pedro
Lupe Carriles
as Margarita
José Chávez
as Manuel
Margarito Luna
as Jose
Roberto Contreras
as Carlos
Manuel Arvide
as Martinez
Ismael Rodríguez
Director
Robert Hill
Screenplay
Edward Nassour
Producer
Jorge Stahl Jr.
Director of Photography
Raúl Lavista
Original Music Composer
William Nassour
Jack DeWitt
Additional Dialogue
Willis H. O'Brien
Idea
Visual Effects
Jack Rabin
Art Direction
Louis DeWitt
Jay Baylor
Original Story
