Cullen enlists a crew of Chinese workers to help him move a locomotive from Truckee to the Summit Tunnel on a sled. An accident forces Cullen and Fong to work together to survive. Meanwhile, Swede and Phineas fight for survival after Cullen banishes them to the high country on snow-shoveling patrol.moreless
Cullen and Durant fight to save the life of a criminal. Louise tries to provide support as Ruth copes with a great loss.
Life is Darker after the death of Elam, Cullen has to choose between the railroad and family.