Cullen and Durant meet with President Grant to discuss the future of the railroad; the Swede puts his plan against the Mormons in action.
Cullen and Mei escort precious cargo through the California wilderness; Eva nurses Louise back to health.
Violence erupts during the festival of Tin Hau Don in Chinatown; Cullen confronts the Swede; Durant gets Maggie involved in his latest scheme.
In the wake of the violence, Cullen solves a Chinese labor strike; Mickey is pulled deeper into Union Pacific Business.
Cullen must deal with the violence in Chinatown, caused by disgruntled workers; Phineas is manipulated in his plot against the Mormons.
Cullen enlists new workers to help him move a locomotive on a sled; Cullen and Fong must work together; Swede and Phineas fight for survival after being banished to the high country.
Cullen is in California with the Central Pacific Railroad, and must learn to contend with the new workers; word comes in from Salt Lake City about the Hatches.
As the railroad prepares to leave Cheyenne behind after Sherman Peak; Cullen returns to Fort Smith to get his family.
Cullen struggles with Ruth's unexpected decision; Louise risks her reputation to fight for a story she believes in.
Cullen and Durant work to save the life of a criminal; Louise supports Ruth as she copes with a loss.
Cullen, Durant and Campbell try to negotiate a settlement on how the streets will be policed; an act of terror strikes Cheyenne.
Cullen faces off against the new marshal to recover his arrested railroad workers; Campbell confronts Louise.
In order to ensure his family's safety, Cullen makes a decision; Campbell hires a new federal marshal with hopes of cleaning up the streets.
When Elam returns, Cullen tries to reconnect; Durant puts an old problem to rest.
Elam tries to recover in a Comanche village from a savage bear attack, to make his way back to Cheyenne.
Cullen's family is at risk when a stranger arrives, stirring up old feelings; The Swede faces the consequences.
Cullen handles trouble at home and takes railroad matters into his own hands; Campbell makes a move against Mickey and Durant.
Cullen returns to work on the railroad, and clashes with his new boss; Durant and Campbell battle over valuable real estate.
As Cullen plans an exit from Fort Smith, he challenges The Swede; when a new adversary arrives, Cheyenne feels his presence.
Cullen awaits the birth of his baby; Durant must deal with the fallout following a railroad accident.
The minds behind the show explain the importance of the ceremonial completion of the railroad and what it meant to Americans in the 19th century.
The cast and creators provide hints as to what to expect in the finale episodes as the railroad reaches completion.
A look back at the last season.
When the race to finish the railroad comes down to mere inches, all parties find themselves pondering the end of the line and what the future has in store for them.
Chang forces Mei to leave Truckee after discovering her secret; Cullen exorcises some old demons during his search.
Chang forces Mei to leave Truckee after discovering her secret; Cullen exorcises some of her old demons during her search.
Cullen's nitroglycerin experiment makes an explosive backdrop for the railroad life in Truckee; Durant's plan takes a deadly turn.
Cullen considers life-changing decisions in Utah; Truckee adapts to life without Cullen; lies compromise Durant's new partner.
When the Swede goes on a murderous rampage on the Hatch homestead, a long-overdue showdown with Cullen ensues.