Cullen finds a route through the mountains to Ogden, Utah. ...

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 ...

Cullen contends with violence in Chinatown set off by disgruntled railroad workers. The Swede manipulates Phineas in his plot against the Mormons. ...

In the wake of the violence, Cullen solves a Chinese labor strike; Mickey is pulled deeper into Union Pacific Business. ...

Unexpected violence strikes during the festival of Tin Hau Don in Chinatown. Cullen confronts The Swede. Durant involves Maggie in his latest scheme. ...

Cullen and Mei take a dangerous journey through the California wilderness, escorting precious cargo. Eva nurses Louise back to health. ...

Cullen and Durant discuss with President Grant what will be the future of the railroad; The Swede goes ahead with his plan against the Mormons. ...

The premiere sees the Swede's murderous rampage on the Hatch homestead resulting in a long overdue showdown with Cullen. ...

Cullen faces life-changing decisions in Utah as Truckee adapts to life without him. ...

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

Durant's plot to ransom himself takes an unexpected turn when Campbell arrives in town with the Cavalry to coordinate a rescue operation. ...

Chang discovers Mei's secret and forces her to flee Truckee. Cullen's search for her brings new realizations while exorcising old demons. ...

The race to Ogden is coming to an end but when Cullen find out that the workers are missing it seems impossible to finish first. ...

Government hearings, incalculable actions and the golden spike breed new beginnings and endings for those left standing. ...