The plot revolves around a rivalry between sand-hog "Hard Rock" Harrigan (O'Brien) and his foreman Black Jack Riley. At the center of their conflict is their mutual affection for heroine "Andy" Anderson (Irene Hervey). But when the chips are down and Riley is trapped in a tunnel cave-in, it is Harrigan who comes to the rescue.
Is Hard Rock Harrigan on Netflix? Unfortunately the movie Hard Rock Harrigan is not yet available on Netflix.
| Writing | Daniel Jarrett | Screenplay |
| Writing | Raymond L. Schrock | Screenplay |
| Writing | Charles Furthman | Story |
| Directing | David Howard | Director |