4221

In 4221, recorded as 43K2.1 by the 43rd century dating system, (AUDIO: The Torchwood Archive) Sanctuary Base 6 was assaulted by the Beast, which was defeated by the Tenth Doctor and Rose Tyler. (TV: The Impossible Planet / The Satan Pit)
Curiously, Sanctuary Base 6 held a complement of Ood slaves, despite the prior Ood liberation of 4126 with the help of the Tenth Doctor and Donna Noble. (TV: Planet of the Ood)