Prepare to hide behind the sofa! The second part of the special Doctor Who adventure, Dimensions in Time, bursts from the screen in glorious 3-D In tonight's House Party.The first part of the story was shown last night as part of Children in Need, and ended with the traditional cliffhanger. The evil Rani (Kate O'Mara ) has five of the Doctors (Jon Pertwee, Tom Baker, Peter Davison, Colin Baker and Sylvester McCoy) caught in a time loop in the East End of London, where he meets some suspiciously familiar characters. Will the power of Rani triumph? Or will the Doctor escape to fight another day? It's up to the viewers to decide, in a special phone vote.The results of the vote will be seen on tonight's show, so have your 3-D glasses at the ready.