In this extraordinary episode, The Doctor has to try and solve a huge mystery as he, Rose and Jack are all suddenly separated from each other after they are seemingly abducted from the TARDIS. To make things even more bizarre, The Doctor is suddenly a house mate in Big Brother, Rose is a contestant on The Weakest Link, and Jack is in what not to wear. Stranger still, all the hosts seem to be murderous robots.
However, when the Doctor finally finds out just where he is, he realises that the consequences of something he did at the very same place some time ago is having serious ramifications now, and the people of Earth are easy prey to one of the Doctor's deadliest enemies...one that the Doctor is determined to fight against to save Rose. Brace yourself for one of the most extraordinary cliff-hanger endings of a Doctor Who episode ever...