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.
| Writing | Martin Maurice | Novel |
| Directing | Antonio Pietrangeli | Director |
| Production | Gianni Hecht Lucari | Producer |
| Directing | Valerio Zurlini | Co-Director |
| Editing | Franco Fraticelli | Editor |
| Art | Maurizio Chiari | Production Design |
| Camera | Mario Montuori | Director of Photography |
| Writing | Antonio Pietrangeli | Screenplay |
| Sound | Armando Trovajoli | Original Music Composer |
| Costume & Make-Up | Maurizio Chiari | Costume Design |
| Production | Renato Jaboni | Production Manager |
| Costume & Make-Up | Margherita Ferroni | Assistant Costume Designer |
| Writing | Tullio Pinelli | Screenplay |
| Production | Fausto Saraceni | Executive Producer |
