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"Hell on Wheels" Season 3

Cullen Bohannon (Anson Mount) in AMC's "Hell on Wheels" Season 3.

'Hell on Wheels' Season 3 Sneak: Everyone's Still Working on the Railroad [Exclusive Photos]

When AMC's "Hell on Wheels" begins its third season on August 3 (9 PM), the year is 1867 and Cullen Bohannon, Thomas Durant, and Elam Ferguson are all devoted to completing — and benefitting from — the construction of the first transcontinental railroad, an event a New York newspaper has deemed "the story of the century." And, though his focus has been elsewhere in seasons past, it's Bohannon who may be the most committed to the railroad project in the new season. — Kimberly Potts, Yahoo! TV