The fourth season of the AMC television series Hell on Wheels premiered on August 2, 2014 and comprised 13 episodes. This season continued to focus on the westward expansion of the Union Pacific Railroad. Conflicts among the government, businesses, ranchers, homesteaders, and the railroad are also depicted, as all of those interests compete with one another for control of Cheyenne, Wyoming, the most important railroad hub in 1867. Cast Main cast The fourth season features eleven series regulars. Jake Weber and MacKenzie Porter are added to the main cast. Common, who plays Elam Ferguson, is not credited among the main cast until his reappearance in the episode "Bear Man". Anson Mount as Cullen Bohannon, a former Confederate soldier, who is imprisoned in a Mormon fort with his pregnant wife, Naomi, and must find a way out from under the Swede (12 episodes) Colm Meaney as Thomas C. Durant, who must figure out how to get the railroad moving without Cullen Bohannon, all the while warding off the arrival of big government that threatens to seize control of Cheyenne and his railroad (12 episodes) Common as Elam Ferguson, the chief of railroad police who pursued the masked gang who kidnapped Cullen, only to be mauled by a bear on the prairie and left for dead (2 episodes) Christopher Heyerdahl as Thor "The Swede" Gundersen, who, after stealing the identity of the patriarch of a Mormon ward, uses his new identity and power as "Bishop" to keep Cullen Bohannon as his personal prisoner (7 episodes) Robin McLeavy as Eva, a former Indian captive turned whore, who finds herself homeless, penniless, and alone after giving away her baby to her brother-in-law Declan Toole, and Elam Ferguson goes missing (12 episodes) Jennifer Ferrin as Louise Ellison, a journalist and editor of The Cheyenne Leader (daily newspaper) (9 episodes) Phil Burke as Mickey McGinnes, the owner of a casino and whorehouse and the honorary Mayor of Cheyenne (11 episodes) Dohn Norwood as Psalms Jackson, head of a skeleton crew of freedmen who are leading the charge to break through the mountains holding the railroad's progress at bay (12 episodes) Kasha Kropinski as Ruth Cole, a preacher in the burgeoning city of Cheyenne. She finds new purpose as a mother to the Mormon boy Ezra. (8 episodes) MacKenzie Porter as Naomi Hatch Bohannon, Cullen Bohannon's wife, who struggles to build a new life, family, and home,