As fans get ready for the return of Hell on Wheels next month, AMC has released a behind-the-scenes featurette and a trailer with new footage. Stars Anson Mount and Robin McLeavy reveal that Cullen and Eva will be faced with consequences they've never had to deal with before, while MacKenzie Porter discusses how her character, Naomi, brings out a new side in Cullen. Go behind-the-scenes with the cast and crew of Hell on Wheels before Season 4 debuts Saturday, August 2 at 9 PM ET with "The Elusive Eden".

Season 3 of Hell on Wheels ended with Cullen Bohannon (Anson Mount) married to a pregnant Naomi and living in the Mormon fort where the Swede (Christopher Heyerdahl) was impersonating church leader, Bishop Dutson; Thomas "Doc" Durant (Colm Meaney) back in control of the Union Pacific Railroad which had successfully expanded westward to Cheyenne; and Elam (Common, gravely injured by a bear while searching for the missing Cullen. As Season 4 unfolds, civilization makes its way west with the railroad, bringing with it men who attempt to do with their pens what rougher men did in seasons past with their guns. Conflict between government and big business, ranchers, homesteaders and the railroad will continue to define the drama as all of those interests compete with one another for control of Cheyenne, Wyoming, the "Magic City of the Plains," and the most important railroad hub in the country. The season will also introduce several new characters including John Campbell (Jake Weber, Medium, The Following).