The Doctor takes Rose on her first voyage through time to the year Five Billion. The sun is about to expand and swallow the Earth. But among the alien races gathering to watch on Platform One, a murderer is at work. Who is controlling the mysterious and deadly spiders?

Rose and the Doctor travel billions of years into the future to witness the end of the earth along with an assortment of aliens. Behind the scenes, special effects and different alien costumes were developed and created, including the last human in existence ? no more than a bit of stretched skin!