Cast & crew
The Testing Block (1920)
Directed by Lambert Hillyer Written by Lambert Hillyer, William S. Hart
Cast
| Richard Headrick | Sonny Corleone |
| Florence Carpenter | Rosita |
| William S. Hart | Sierra |
| Eva Novak | Nelly Boxall |
| J. Gordon Russell | Ringo |
| Ira McFadden | Texas Slim |
Crew
| J.C. Hoffner | Art Direction |
| LeRoy Stone | Editor |
| Joseph H. August | Director of Photography |
| Lambert Hillyer | Director |
| Lambert Hillyer | Scenario Writer |
| Lambert Hillyer | Screenplay |
| William S. Hart | Screenplay |
| William S. Hart | Story |