
Federico is having an affair with Fernanda, which he believes widow, when in fact she is married. When the trick is discovered, a doctor appears very opportunely saying that infidelity is a disease caused by bacteria and has no cure. In his private clinic he applies a treatment that consists of locking up every adulterer with his mistress.
Cast

Carmen Sevilla
Fernanda

Manolo Gómez Bur
Melecio

Fernando Fernán Gómez
Doctor Leopoldo Cumberri

Jaime de Mora y Aragón
Eduardo Bernal

Andrés Pajares
Federico Latorre

José Orjas
Eladio

Guadalupe Muñoz Sampedro
Baruti

Matilde Muñoz Sampedro
Magdalena

Mary Begoña
Emiliana Regueiro

Venancio Muro
Raigoso

María Isbert
Antonia

Julio Riscal
Paco

Rosa Palomar
Patro

Manuel Alexandre
Joaquín Renovales

Erasmo Pascual
Dr. Fernández

Maribel Hidalgo
Margarita

Rafael Hernández
Fermín

Vicente Haro
Galán

Mónica Randall
Pupé
José Alfayate
Bartolomé Ortigueira

Joaquín Prat
Joaquín Prat (uncredited)

Francisco Rabal
Conserje (uncredited)

Rafael J. Salvia
Dr. González (uncredited)

José Luis Uribarri
José Luis Uribarri (uncredited)
Miguel Utrillo
Doctor 3 (uncredited)
Crew

Rafael Gil
Director

Rafael J. Salvia
Adaptation
José Antonio Rojo
Editor
José F. Aguayo
Director of Photography
Jaime D'Ors
Assistant Director
José Ángel Santos
Production Assistant
Ra del Rey
Production Design
Francisco Gómez Conde
Assistant Camera
Miguel Rueda
Costume Designer
Ana Criado
Hairstylist
Cristóbal Criado
Makeup Artist
Manuel Parada
Music

Augusto Algueró
Songs
César Lucas
Still Photographer
Jesús Narro
Property Master
Valentín Panero
Production Manager

Enrique Jardiel Poncela
Theatre Play