AMC period drama 'Hell on Wheels' will return for its biggest year yet this coming Saturday, August 2, kicking off an extended 13-episode season 4 run. As with any new season, 'Hell on Wheels' season 4 will introduce a bevy of new characters to complicate our hero's world, and we've got an exclusive look at the new villains and allies of 'Hell on Wheels' season 4.

Tying back into last year's Mormon plot, our exclusive look at the new characters of 'Hell on Wheels' season 4 kicks off with Cullen Bohannon (Anson Mount)'s 19 year-old pregnant Mormon wife Naomi (Mackenzie Porter). As if a baby on the way weren't enough to think about, we'll also meet the new "cold-blooded" Wyoming governor John Campbell (Jake Weber), and his nefarious cronies Marshal Jessup (Peter Benson) and the sociopathic Heckard (Billy Wickman)

Meanwhile, here's how AMC describes Saturday's 'Hell on Wheels' season 4 premiere, "The Elusive Eden"

Durant must deal with the fallout following a railroad accident.

For those eagerly awaiting Saturday's premiere, 'Hell on Wheels' season 4 will air in two parts, with the first 10 episodes running consecutively through Saturday, October 4, before taking a hiatus for the annual FearFest program. The first of the final three episodes of the expanded season will premiere on Saturday, November 8.

You can get to know the newest characters of 'Hell on Wheels' season 4 in our exclusive preview above, but what say you? Will you tune in to see what the Transcontinental railroad drama brings in its fourth stretch of track?