"Two wrestling stars must investigate strange deaths and a secret criminal organization led by a madman who becomes invisible."
'Karloff' Lagarde
as Satan
René 'Copetes' Guajardo
as Ángel
Gina Romand
as Anna
Andrés Soler
as Professor Resnik
Jesús Salinas
as Nando
María Eugenia San Martín
as Carmen Sanchez-Peña
Claudio Brook
as Professor Davenport
Héctor Godoy
as Antonio
Consuelo Frank
as Sra. Sanchez-Peña
Miguel Manzano
as Inspector Saldivar
Carlos Nieto
as Gustavo
Ramón Bugarini
as Ramiro
Guillermo Hernández
as Ramón (as Guillermo Hernández 'Lobo Negro')
Fernando Osés
as Luchador
Enrique Ramírez
as
Tito Novaro
as Gerente hotel
René Barrera
Antonio Montoro
Beny Galán
Jorge Allende
Mishima Ota
Humberto Garza
Jean Safont
Rizado Ruiz
Juventino Romero
Rodolfo Ruiz
Mario Texas
Dorrel Dixon
Johnny Laboriel
as Cantante cabaret
Miguel Arenas
as Don Miguel
Augusto Benedico
as Julio Arena
Alfonso Carti
as Policía
Juan Garza
as Agente policía
Antonio «Pícoro» Padilla
as Anunciador ring
Emilio Gómez Muriel
Writer
Producer
Guadalupe Beltrán
Hairstylist
Arcadi Artis Gener
Art Direction
Fernando Colín
Cinematography
Fernando Solórzano “El Flaco”
Set Decoration
Virginia Campos
Alfredo Ruanova
Raul J. Casso
Editor
Antonio Díaz Conde
Original Music Composer
Graciela Muñoz
Makeup Artist
Alfredo B. Crevenna
Director