After a wave of arrests in 1969, Italian anarchist Giuseppe Pinelli allegedly falls out of a police building window while being interrogated. The circumstances leading to his death are re-enacted in three hypothetical versions in this attempt at counter-investigation.
| Directing | Elio Petri | Director |
| Writing | Elio Petri | Screenplay |
| Camera | Luigi Kuveiller | Director of Photography |
| Editing | Raimondo Crociani | Editor |
| Sound | Romeo Balsamo | Sound Designer |
| Writing | Ugo Pirro | Screenplay |
