HELL ON WHEELS "It Happened in Boston" Preview

Photo Credit: AMC

Season 3 of HELL ON WHEELS continues on Saturday, September 21st at 9 p.m. ET/PT on AMC Network.

In this week's episode, "It Happened in Boston," after his workers defect to the Mormons, Cullen (Anson Mount) recruits Durant (Colm Meaney) to help get them back.

Meanwhile, Sean and Mickey’s past comes back to haunt them.

Watch a sneak peek video below: