Cullen's nitroglycerin experiment provides an explosive backdrop for the railroad life in Truckee. Durant's plan turns deadly.

Cast: Anson Mount, Colm Meaney, Robin McLeavy, Phil Burke, Jennifer Ferrin, Tim Guinee, Byron Mann, Reg Rogers, Angela Zhou, Chelah Horsdal, Barry Flatman, David Wilson Barnes, Andrew Howard, Leon Ingulsrud, Jennifer Lim