Conrado San Martín as Inspector Tanner

Diana Lorys as Wanda Bronsky / Melissa

Howard Vernon as Dr. Orloff

Perla Cristal as Arne

María Silva as Dany (as Mary Silvers)

Ricardo Valle as Morpho Lodner

Mara Laso as Irma Gold

Venancio Muro as Jean Rousseau 'Jeannot'

Félix Dafauce as Chief Inspector

Faustino Cornejo as Raymond

Manuel Vázquez as Klein

Juan Antonio Riquelme as

Fernando Montes as Malou (as Fernando C. Montes)

Elena María Tejeiro as Ursula Camila

Javier de Rivera as

Ángel Calero as

Sandalio Hernández as

Fernando Sala as

María de la Riva as (as Mª de la Riva)

Laly Vicent as

José Carlos Arévalo as

Enrique Ferpi as

Rafael Ibáñez as

Carmen Porcel as Madame Gold

Rafael Hernández as

Marisa Paredes as Klemp

Luis Rico as

Juan García Tiendra as False Suspect

Amy Márquez as

Antonio Ramos as

Luis Domínguez Luna as

María del Carmen Ruiz as (as Mari Carmen Ruiz)

Pedro José Mariña as

Pilar Gómez Ferrer as Wanda's Dresser

Tito García as

Mercedes Manero as (as Mercedes Manera)

Antonio Ramos as

Juan Antonio Arévalo as (as Juan Antº Arévalo)

Jesús Franco as Pianist (uncredited)