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.
| Directing | Rafael Gil | Director |
| Writing | Enrique Jardiel Poncela | Theatre Play |
| Writing | Rafael J. Salvia | Adaptation |
| Sound | Manuel Parada | Music |
| Camera | José F. Aguayo | Director of Photography |
| Editing | José Antonio Rojo | Editor |
| Art | Ra del Rey | Production Design |
| Costume & Make-Up | Ana Criado | Hairstylist |
| Costume & Make-Up | Cristóbal Criado | Makeup Artist |
| Production | Valentín Panero | Production Manager |
| Directing | Jaime D'Ors | Assistant Director |
| Art | Jesús Narro | Property Master |
| Camera | Francisco Gómez Conde | Assistant Camera |
| Camera | César Lucas | Still Photographer |
| Costume & Make-Up | Miguel Rueda | Costume Designer |
| Sound | Augusto Algueró | Songs |
| Production | José Ángel Santos | Production Assistant |