Outlaws - Season 1 Episode 4 Orleans

When the agency runs short on funds they set out to New Orleans to recover a buried stash that Isaiah hid back in 1886. The land is owned by a descendant of Isaiah's slaveowner who runs his own criminal racket. While Isaiah helps one of his own descendents who has run afoul of the man, he and the fellows take on the crook and in the end Isaiah defeats him in an old-fashioned duel.