A man is hospitalized in a neurological clinic, suffering from amnesia. After seeing his photo in the newspaper, Mrs. Ballerini realizes that he is her husband and brings him home; then Mrs. Polacich recognizes him as her husband.
Unfortunately the movie Lo smemorato di Collegno is not yet available on HBO Max.
| Directing | Sergio Corbucci | Director |
| Writing | Bruno Corbucci | Screenplay |
| Writing | Bruno Corbucci | Story |
| Writing | Giovanni Grimaldi | Screenplay |
| Writing | Giovanni Grimaldi | Story |
| Sound | Piero Piccioni | Conductor |
| Sound | Piero Piccioni | Original Music Composer |
| Production | Gianni Buffardi | Producer |
| Production | William Menarini | Co-Producer |
| Camera | Enzo Barboni | Director of Photography |
| Editing | Giuliana Attenni | Editor |
| Art | Giorgio Giovannini | Production Design |
| Art | Brunello Serena Ulloa | Set Decoration |
| Costume & Make-Up | Marcella De Marchis | Costume Design |
| Costume & Make-Up | Anna Cristofani | Hairstylist |
| Costume & Make-Up | Franco Di Girolamo | Makeup Artist |
| Production | Renato Angiolini | Production Manager |
| Production | Ennio Di Meo | Production Supervisor |
| Directing | Mario Castellani | First Assistant Director |
| Directing | Ruggero Deodato | Second Assistant Director |
| Directing | Franco Rossellini | First Assistant Director |
| Sound | Giulio Tagliacozzo | Sound |
| Camera | Renato Fait | Assistant Camera |
| Camera | Stelvio Massi | Camera Operator |
| Camera | Giorgio Tonti | Second Assistant Camera |
| Editing | Marcella Bevilacqua | Assistant Editor |
| Production | Gianni Di Stolfo | Production Secretary |
| Production | Luciano Foti | Production Secretary |