This one finds Jack Slade and Mary Conway,alias Blanche, being recognized as known and wanted crooks by deputy marshal Harry Stevens and, when he orders them out of town, Slade kills him. His son, Bob Stevens and friend Parkford become U.S. Marshals and proceed to rid the town of the cut-throat gang that has been terrorizing the citizens. Bob goes undercover as an outlaw and works his way into the gang, while Hoot poses as a Dude who goes about making fiery speeches on behalf of law and order.
Unfortunately the movie Marked Trails is not yet available on HBO Max.
| Writing | John P. McCarthy | Screenplay |
| Writing | John P. McCarthy | Story |
| Camera | Harry Neumann | Director of Photography |
| Writing | Victor Hammond | Screenplay |
| Directing | John P. McCarthy | Director |
| Production | William Strohbach | Producer |
| Editing | John C. Fuller | Editor |
