Jackie and Ray try to return to business as usual after a depressing failure, only to learn the case might not actually be closed. ...

When Jackie realizes Junior's involved with Sherry Hunter's murder, she enlists Ray and the entire CCINU to track him down -- before Frankie has him murdered. Renee finds ...

Jackie and Junior struggle to cope in the wake of a traumatic event. Ray's investigation picks up speed. Ray is there for Renee when she really needs him. ...

Jackie goes on a bender, threatening everything she's got going for her, throwing her sobriety out the window, and ultimately putting Krista Collins in danger like never ...

Jackie finds out where Krista Collins is staying, but gets pulled back into her own life. Ray comes face to face with Osito, Junior tries to reconcile with Donna's family ...

Jackie returns to rehab, but only to help further her investigation. Ray starts closing in on Osito at the same time he and Renee cross the line. Junior takes the first s ...

After discovering a lead on Sherry Henry's murder, Jackie becomes determined to solve the case. Junior finds himself trapped in a position he can't stomach, and Ray finds ...

National Marine Fisheries Services (NMFS) agent Jackie Quinones has a wrench thrown in her fun, free-wheeling, booze-addled life when she uncovers a dead body on the beac ...

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

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. ...

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

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

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

As the railroad prepares to leave Cheyenne behind after Sherman Peak; Cullen returns to Fort Smith to get his family. ...

Ruth is determined that her fate is sealed. Her trial gives her two possible outs, both of which she dismissed. Cullen provides his accurate detail as police officer, det ...

Cullen and Durant work together to save the life of a criminal; Louise supports Ruth as she copes with a loss. ...

Cullen, Durant and Campbell come together in order to discuss a means by which to provide protection to the citizens of Cheyenne. They must return a sense of well-being t ...

Cullen attempts to make a stand to free Durant and the rest of the prisoners after Campbell decides to transport them back east. The only thing standing in his way is Sno ...

Naomi's unrest forces Cullen to take her and William back to the Mormon settlement at Ft. Smith. Campbell deputizes several undesirables in response to the deaths of his ...

Durant seeks revenge for his attack. Bear Killer (Elam) returns to Cheyenne trying to sell the female slaves he has. Due to Campbells presence, Cullen and Eva attempt to ...

The arrival of a dangerous stranger stirs up old feelings in Cullen and puts his family at risk. The Swede faces consequences at Fort Smith. ...

Cullen attempts to find a way for the railroad to pass over the mountains for Durant. As a Mormon, Naomi has her own struggles settling into Cheyenne. Brother Hatch conti ...

Cullen returns to Cheyenne. After being considered dead his return is a shock for many. Bohannan meets a few old friends and makes new enemies whilst trying to get his ol ...

Cullen challenges The Swede as he plans his exit from Fort Smith. A new adversary arrives and makes his presence felt in Cheyenne. ...

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 deals with consequences; Elam mounts a rescue attempt; Durant receives the U.P. board ahead of the deadline. ...

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

Cullen seeks help from Durant in winning his workers back from the Mormons; Sean and Mickey are haunted by their past. ...

A cholera epidemic breaks; Cullen must locate fresh water before his employees perish; Durant faces political fallout. ...

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

An unexpected roadblock forces Cullen to make a difficult choice as a reporter arrives in Hell on Wheels. Elam struggles with his new boss. ...

After a hard winter, Cullen and Elam travel to New York to secure their positions on the railroad as Durant fights for his legacy from prison. ...