Last time, David Tennant exploded into a new regeneration and set the TARDIS on fire in the process. It's rapidly crashing into London with Matt Smith, the Eleventh Doctor, hanging off of it. He scrambles back in and manages to crash-land the TARDIS in a sleepy England village. A little Scottish girl is praying to Santa that he will send someone to just fix that creepy crack in the wall. She's interrupted by the sound of a police telephone box parking inself in her backyard... on its side. The TARDIS is working again, with a brand new interior.