The first part of the two-part season finale for Doctor Who will air in the UK this weekend, but TV previews for the episode are already online. Dubbed “The Stolen Earth”, the episode will feature all the previous companions since the show restarted back in 2005 – Rose Tyler, Donna Nable, Sarah Jane-Smith, Captain Jack Harkness and Martha Jones are all there, joining forces to fight off the rise of the new Dalek empire.

Chracters from Torchwood, Luke from “The Sarah Jane Chronicles”, former PM Harriet Jones, and various members of the Tyler, Jones and Noble families are also set to appear. Finally, Davros, the scientist who created the Daleks, will also appear in the episode, playing a key role.

Hit the jump for the video.