A looming railroad deadline throws Cullen and Lily together; Joseph and Elam deal with what their violent mission has wrought.

The golden spike, government hearings and unpredictable actions mean new beginnings and endings for the survivors.

In the Season 1 finale, Cullen's past and future collide, impacting his life on the railroad.

Cullen, Durant, and Campbell try to negotiate a settlement on how the streets will be policed. An act of terror strikes Cheyenne.

Cullen goes head to head with the new marshal to recover his arrested railroad workers. Campbell confronts Louise over a story.

Durant files an injunction against Union Pacific, threatening Cullen's position; Elam deals with a dangerous newcomer.

Cullen prepares for battle while the town celebrates.

Durant dispatches Cullen and Elam on a mission of vengeance. Lily struggles to find her place.

Cullen attempts to reconnect with Elam upon his return. Durant takes matters into his own hands while putting an old problem to rest.

With General Grant's deadline only two days away, a gang of riders attacks Cheyenne while Cullen and Elam pay Durant a visit.

Cullen fights to save Hell on Wheels.

With Elam's life in the balance, Cullen must decide how much he’s willing to risk. Meanwhile Durant faces financial ruin as Lily confronts the family of her late husband.

Cullen's past catches up with him and threatens the fate of the railroad.

As Cullen plans an exit from Fort Smith, he challenges The Swede; when a new adversary arrives, Cheyenne feels his presence.

Cullen grapples with consequences while Elam mounts a rescue attempt. Durant receives Gen. Grant and the U.P. board in Cheyenne ahead of the deadline.

Lily encounters natives in the wilderness. Cullen is questioned in regards to his recent actions against others. Meanwhile, Durant continues his push for political gain through his persuasions.

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.

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

Cullen solves a Chinese labor strike in the wake of violence. Meanwhile, Durant pulls Mickey deeper into Union Pacific business.

Cullen is in California with the Central Pacific Railroad, and must deal with the new workers.

Following an attack by a bear, Elam struggles to survive in a Comanche village and find his way back to Cheyenne.

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

Cullen and Fong find themselves in peril as they transport a locomotive over the Sierra Nevada mountains. The Swede gains Phineas' trust.

Cullen awaits the birth of his baby, laboring under The Swede's thumb at Fort Smith. Durant deals with the fallout from a railroad accident.

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

Mickey's dirty business with Durant leaves him with blood on his hands. Meanwhile, Campbell's return to town complicates Louise's life.

Cullen deals with trouble at home as he takes railroad matters into his own hands. Campbell makes a move against Durant and Mickey.

In the Season 2 premiere, Durant and Lily steer the railroad further west, while Cullen and Elam land on opposite sides of the law.

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

Cullen's search for the sergeant nears its end; Durant keeps to his hidden agenda while assisting in Lily's recuperation.

Cullen helps Elam track down a dangerous criminal; the town prepares to move down the tracks.

A former confederate soldier journeys to the transcontinental railroad to seek vengeance.

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