1881

On 26 October 1881, the Gunfight at the O.K. Corral occurred in Tombstone, Arizona Territory in the USA. The fight, between the Earp brothers and Doc Holliday against a group of outlaws, became one of the most iconic events in the history of the Old West. The First Doctor, Steven Taylor and Dodo Chaplet arrived in Tombstone in the hours preceding the fight for the Doctor to treat a toothache; Holliday did the dentistry. The Doctor, Steven and Dodo subsequently witnessed the gunfight. (DW: The Gunfighters)

Behind the scenes
According to The Brilliant Book 2012, a non-canonical REF book; in Egypt, Madame Vastra helped a group of archaeologists excavate a tomb, with the intention of eating any mummies found inside. Meanwhile, in London, the Doctor and Jenny defeated a Kraal plot to replace Prince Bertie with an android duplicate.