A middle-aged plumber quits his job and questions his life after seeing somebody his own age suddenly die from a heart attack on his way to work.
| Directing | Elio Petri | Director |
| Writing | Elio Petri | Screenplay |
| Camera | Ennio Guarnieri | Director of Photography |
| Art | Giovanni Checchi | Set Decoration |
| Costume & Make-Up | Graziella Urbinati | Costume Design |
| Writing | Elio Petri | Story |
| Editing | Ruggero Mastroianni | Editor |
| Sound | Ivan Vandor | Original Music Composer |
| Writing | Carlo Romano | Screenplay |
| Writing | Tonino Guerra | Story |
| Art | Giovanni Checchi | Production Design |
| Directing | Berto Pelosso | First Assistant Director |
| Sound | Enzo Silvestri | Sound |
| Camera | G.B. Poletto | Still Photographer |
| Camera | Luigi Bernardini | Camera Operator |
| Directing | Flavio Niccolini | Script Supervisor |
| Editing | Vanda Olasio | Assistant Editor |
| Sound | Luigi Urbini | Conductor |
| Production | Anna Maria Campanile | Production Manager |
| Production | Aldo Pace | Unit Manager |
| Production | Bruno Sassaroli | Unit Manager |
| Production | Goffredo Lombardo | Producer |
| Writing | Tonino Guerra | Screenplay |
| Camera | Francesco Marino | Assistant Camera |