The End of the World

The Ninth Doctor takes his new companion, Rose Tyler, to the year 5,000,000,000 to see the sun expand and destroy the Earth. The observation deck space station, Platform One, is holding an event with the richest beings of the time observing the Earth's destruction, but mysterious metal spiders gifted by the Adherents of the Repeated Meme to the other guests are secretly infiltrating and sabotaging the station.