The Last Fenian Raid - S2.E6

A retired Canadian colonel arrives in Bordertown with a stongbox containing money obtained by docking his men's pay. His intentions are to set up an estate for the men to work on when they muster out. Liam's niece, her husband, and cousin have joined the Fenian Brotherhood, and are after the money. Along with the strongbox, they kidnap the colonel, who had helped protect Canada from the Fenians years earlier.