Stasi
From Tardis Wiki, the free Doctor Who reference
The Stasi were the East German secret police.
They captured the War Doctor and Lara Zannis in East Berlin in 1961. They were interrogated by Stasi officer Kruger, who helped the Doctor follow Zannis to West Berlin to stop her from creating the Shadow Vortex. (AUDIO: The Shadow Vortex)
They captured Steven Taylor and Sara Kingdom in 1966. (AUDIO: The Anachronauts)
Toshiko Sato told Mary that Torchwood were not the Stasi. (TV: Greeks Bearing Gifts)
