Enrico Mattei helped change Italy’s future, first as freedom-fighter against the Nazis, then as an investor in methane gas through a public company, A.G.I.P., and ultimately as the head of ENI, a state body formed for the development of oil resources. On October 27, 1962, he died when his private airplane crashed during a flight to Milan. Officially, it is declared an accident, but many journalists explore other plausible reasons for Mattei's untimely death.
| Directing | Francesco Rosi | Director |
| Writing | Tonino Guerra | Screenplay |
| Sound | Piero Piccioni | Original Music Composer |
| Writing | Francesco Rosi | Screenplay |
| Production | Franco Cristaldi | Producer |
| Camera | Pasqualino De Santis | Director of Photography |
| Editing | Ruggero Mastroianni | Editor |
| Art | Andrea Crisanti | Production Design |
| Costume & Make-Up | Franco Carretti | Costume Design |
| Writing | Francesco Rosi | Story |
| Writing | Tonino Guerra | Story |
| Writing | Nerio Minuzzo | Co-Writer |
| Writing | Tito De Stefano | Co-Writer |
| Production | Gino Millozza | Production Manager |
| Writing | Fulvio Bellini | Novel |
| Writing | Alessandro Previdi | Novel |
| Directing | Marco Guarnaschelli | First Assistant Director |
| Camera | Mario Cimini | Camera Operator |
| Sound | Mario Bramonti | Sound |
| Directing | Franca Invernizzi | Script Supervisor |
| Production | Enzo Porcelli | Production Assistant |
| Camera | Marcello Mastrogirolamo | Assistant Camera |
| Camera | Giovanni Fiore Coltellacci | Assistant Camera |
| Production | Enzo Consolini | Administration |
| Editing | Lea Mazzocchi | Assistant Editor |
| Sound | Mario Morigi | Sound Mixer |
| Production | Antonio Sarno | Unit Manager |
| Production | Gian Maria Avetta | Unit Manager |
| Production | Giovanni Manganelli | Production Secretary |