The Doctor, Rose and Jack fight for their lives on board Satellite 5, renamed the Game Station by the Bad Wolf Corporation, little suspecting a more sinister threat is lurking in the shadows that could spell the end for the human race. First in a two-part tale, starring Christopher Eccleston and Billie Piper, with guest voice-overs by Anne Robinson, Davina McCall, Trinny Woodall and Susannah Constantine