"Dedicated, saintly nurse has a twin sister who is a Bad Girl."
Ana Luisa Peluffo
as Laura Moreno / Vicky
Carlos Cores
as Dr. Enrique Molina
Rubén Rojo
as Martín
Fanny Schiller
as La Mariposa
Francisco Jambrina
as Dr. Andrade
Consuelo Monteagudo
as Srita. Ocampo
Manuel Arvide
as Insp. Jiménez
Enrique García Álvarez
as Director de sanatorio
José Muñoz
as Policía
José Chávez
as Ferrocarrilero asesinado (uncredited)
Guillermo Hernández
as Mesero
Cecilia Leger
as Taquillera
Inés Murillo
as Paciente de doctor
Beatriz Ramos
as Recepcionista en sanatorio
Joaquín Roche
as Don Carlitos
Ricardo Sánchez de la Barquera
as Miguel Ángel
Alfonso Corona Blake
Director
Óscar J. Brooks
Story
Screenplay
Fernando Galiana
Writer
Sergio Magaña Hidalgo
Dialogue
Producer
Ernesto Enríquez
Manuel Esperón
Music
Jack Draper
Director of Photography
Rafael Ceballos
Editor
Guillermo Castillo
Casting
José Rodríguez Granada
Production Design
Dolores Camarillo
Makeup Artist
María E. Salazar
Hairstylist
Enrique L. Morfín
Production Supervisor
Américo Fernández
Assistant Director
Roberto Camacho
Sound Recordist
Luis Fernández
Armando Stahl
Special Effects
Urbano Vázquez
Camera Operator
Luis García
Lighting Technician
Eufemio Rivera
Assistant Editor
Pedro López
Script Supervisor
