The Doctor, without a companion and looking for a new adventure, finds himself stranded on an alien along with the passengers on a London bus. Without his TARDIS, will they be able to return to Earth before the Swarm arrives? It is returning through the dark, and he will knock four times! We review 'The Planet of the Dead' the first of the 2009 Doctor Who specials. The Discussing Network proudly presents Discussing Who Episode 170. Hosted by Kyle Jones, Clarence Brown, and Lee Shackleford.