Duncan Jones, an old friend of Rob's turns up while Rob is away. Danni is sus...
Snowy River: The McGregor Saga
Season 4 Episode 12: A Son for a Son: Part 1
The Morrell clan turn up to settle an old score with Matt. As luck would have it Matt has left town leaving either Rob or Colin to fight in the duel - if they don't, the Morrell's will burn the town down.