In July 1961, Italian alpinist Walter Bonatti sets out to conquer Mont Blanc alongside trusted climbing partners Andrea Oggioni and Roberto Gallieni. Referred to at the time as 'the last great problem', the 800-meter (2,600 ft) vertical wall leading to the summit was the last unscaled face of Western Europe’s tallest mountain.
| Actor | Role |
|---|---|
 Alessandro BorghiWalter Bonatti | Walter Bonatti |
 Pierre DeladonchampsNot listed | Not listed |
 Finnegan OldfieldNot listed | Not listed |
 Marlon JoubertNot listed | Not listed |
 Quentin FaureNot listed | Not listed |
 Alessio Del MastroNot listed | Not listed |
 Jonas BloquetNot listed | Not listed |