Army of Ghosts
"Army of Ghosts" is the twelfth and penultimate episode in the second series of the British science fiction television programme Doctor Who which was first broadcast on BBC One on 1 July 2006.The Doctor tracks the signal back and uses the TARDIS to travel there with Rose and Jackie, arriving at the Torchwood Institute in Canary Wharf.Torchwood built One Canada Square[N 1] around the breach and conducted experiments on it, forcing it open in an attempt to harness it as a source of energy.Yvonne also reveals to the Doctor that his encounter with Queen Victoria made him an enemy of the state and was the catalyst for the creation of Torchwood.Russell T Davies admired Agyeman's performance as Adeola and called her back to fill the role of companion that Piper had chosen to leave.The most notable of these is the cameo of Barbara Windsor as Peggy Mitchell in EastEnders, where she bars a ghost, who she presumes to be Den Watts, from The Queen Victoria.The Guardian commented that the episode was "Who back at its best" while The People complimented the humour of the scene of the Doctor channel surfing.