Paola, wife of a wealthy Turinese industrialist, meets Alberto, a friend of her husband, who emigrated to Argentina and has returned for business reasons. After a few days, Alberto confesses his love to Paola, but she resists. However, during a vacation in Sardinia, having waited in vain for the arrival of her husband, she gives in to Alberto's wishes.
Unfortunately the movie How, When, and with Whom is not yet available on HBO Max.
| Directing | Antonio Pietrangeli | Director |
| Production | Gianni Hecht Lucari | Producer |
| Writing | Martin Maurice | Novel |
| Directing | Valerio Zurlini | Co-Director |
| Editing | Franco Fraticelli | Editor |
| Camera | Mario Montuori | Director of Photography |
| Art | Maurizio Chiari | Production Design |
| Production | Renato Jaboni | Production Manager |
| Writing | Tullio Pinelli | Screenplay |
| Costume & Make-Up | Margherita Ferroni | Assistant Costume Designer |
| Production | Fausto Saraceni | Executive Producer |
| Sound | Armando Trovajoli | Original Music Composer |
| Writing | Antonio Pietrangeli | Screenplay |
| Costume & Make-Up | Maurizio Chiari | Costume Design |
