Amelia Pond is disturbed by a police box crashing into her garden shed. A man jumps out, and searches her house for food that he's craving; he calls himself The Doctor. He discovers a crack in Amelia's wall that leads to an intergalactic prison, and they are told that "Prisoner Zero has escaped." The Doctor then uses the TARDIS, but arrives twelve years later. Prisoner Zero is still on the loose, and The Doctor has no clue where to start... Geronimo!
