In the 1830's beaver trapper Flint Mitchell and other white men hunt and trap in the then unnamed territories of Montana and Idaho. Flint marries a Blackfoot woman as a way to gain entrance into her people's rich lands, but finds she means more to him than a ticket to good beaver habitat.
Unfortunately the movie Across the Wide Missouri is not yet available on Disney Plus.
| Directing | William A. Wellman | Director |
| Production | Robert Sisk | Producer |
| Writing | Talbot Jennings | Story |
| Sound | David Raksin | Original Music Composer |
| Writing | Talbot Jennings | Screenplay |
| Writing | Frank Cavett | Story |
| Writing | Bernard DeVoto | Novel |
| Camera | William C. Mellor | Director of Photography |
| Crew | Evelyn Finley | Stunt Double |
| Editing | John D. Dunning | Editor |