Released:
1965-09-02

Overview:
After a young man is killed in an unexplored subterranean cavern and his girlfriend driven mad by something she saw there, a track found at the scene cannot be identified with any known animal and thus a scientific expedition is launched to find out just what it is that is living there.

Director:
Alfredo B. Crevenna

Runtime:
1h 18min

Genre:
Science Fiction, Horror, Adventure, Fantasy

• Cast:
• 
  José Elías Moreno
  as
  Profesor Díaz
• 
  Carlos Cortés
  as
  Dr. Pena
• 
  Kitty de Hoyos
  as
  Hilda Ramírez
• 
  David Reynoso
  as
  Jaime Rocha
• 
  Columba Domínguez
  as
  Laura Ponce