1875

1875 was the year the Eighth Doctor visited the Dakota Territory of the United States. There, he met General George Armstrong Custer of the United States Army and Running Bear and Chief Sitting Bull of the Lakota Sioux. He also became re-acquainted with Destrii, who was seriously injured by her uncle, Jodafra. It was therefore from this year that Destrii became a travelling companion of the Doctor, with their first journey together being to a hospital to heal the wounds she sustained in this year. (DWM: Bad Blood)

1875 was also Gerald Kneale's birth year. (TW: To the Last Man)