Spain in the 1930s is the place to be for a man of action like Robert Jordan. There is a civil war going on and Jordan—who has joined up on the side that appeals most to idealists of that era—has been given a high-risk assignment up in the mountains. He awaits the right time to blow up a crucial bridge in order to halt the enemy's progress.
| Directing | Sam Wood | Director |
| Writing | Ernest Hemingway | Novel |
| Production | Sam Wood | Producer |
| Camera | Ray Rennahan | Director of Photography |
| Sound | Victor Young | Original Music Composer |
| Writing | Dudley Nichols | Screenplay |
| Production | Buddy G. DeSylva | Executive Producer |
| Art | William Cameron Menzies | Production Design |
| Crew | Jan Domela | Special Effects |
| Sound | George Parrish | Orchestrator |
| Editing | John F. Link Sr. | Editor |
| Sound | Leo Shuken | Orchestrator |
| Art | Hans Dreier | Art Direction |
| Crew | Irmin Roberts | Special Effects |
| Crew | Gordon Jennings | Special Effects |
| Art | Bertram C. Granger | Set Decoration |
| Art | Haldane Douglas | Art Direction |
| Editing | Sherman Todd | Editor |
| Costume & Make-Up | Wally Westmore | Makeup Artist |
| Art | Robert McCrellis | Props |
| Camera | James Grant | Assistant Camera |
| Sound | Don Johnson | Sound Recordist |
| Sound | Harold Lewis | Sound Recordist |
| Directing | Clem Jones | Second Assistant Director |
| Costume & Make-Up | Pat Williams | Wardrobe Designer |
| Costume & Make-Up | LeVaughn Larson | Wardrobe Master |
| Production | Norman Lacey | Location Manager |
| Art | Jack Colconda | Props |
| Costume & Make-Up | Fred Starns | Wardrobe Master |
| Editing | Natalie Kalmus | Color Grading |
| Crew | Farciot Edouart | Special Effects |
