In the Season One finale, the U.S. Army--under General Crook, a.k.a. 'Custer's Avengers'--rolls into Deadwood.

Alma's father, Otis Russell, arrives from New York to 'help' with her claim.

An opium theft leaves Swearengen trying to find common language with his supplier.

With annexation looming, Swearengen calls a meeting to set up an informal government.

Deadwood breathes easier when riders bring a vaccine--and word of a possible Sioux treaty.

After tracking down a murderer, Bullock returns to Deadwood a changed man--and a marked one.

Bullock encounters native resistance in his quest to bring a murderer to justice.

Swearengen transforms the Gem into a courtroom as Deadwood is forced to try a cowardly killer.

Swearengen directs Farnum to buy back the Garret claim; Alma prevails on Calamity Jane and Hickok for help.

Competition arrives for Swearengen in the form of the Bella Union, a gambling outfit from Chicago.

As suspicions arise that 'road agents' may have been the true perpetrators of the massacre, Swearengen takes a special interest in the health of its sole survivor—a young girl ministered to by the unlikely team of Doc Cochran and Calamity Jane.

Montana marshal Seth Bullock executes a last act of justice and relocates to a gold-mining camp known as Deadwood, where he and partner Sol Star look to start a hardware business.