Deadwood

Deadwood was a town in South Dakota in the United States on Earth, and an historical television series set in that town.

In 1878, Jack Harkness stole a gold nugget from a prospector in Deadwood only to lose it to John Hart. (AUDIO: The Death of Captain Jack)

The Eleventh Doctor and Clara visited Deadwood in 1882 to pay their respects to the the recently deceased Wild Bill Hickok. They met Oscar Wilde and Calamity Jane during their time there. (COMIC: Dead Man's Hand)

In 2006, Jack Harkness would not allow Das, a Neanderthal who was sent forward in time from 29,185 BC, to watch the series as he did not understand the concept of historical drama. Jack was concerned that he would pick up "some very mad ideas" from it. (PROSE: Only Human)