Wolf Ruvinskis as Neutron / Carlos Marquez

Gina Romand as Marga

Rodolfo Landa as Inspector Rivas

Jesús Salinas as Chucho

José Gálvez as Dr. Van Nielsen

Rita Macedo as Rebecca Núñez

Rubén Rojo as Oswaldo

Alberto Mariscal as Captain Julio Fuentes

Graciela Lara as Berta

Nathanael León as Gaston

Guillermo Orea as

Antonio Raxel as

Guillermo Hernández as Lobo Negro

Julián de Meriche as Sergio Romanov