Doctor Who Episode 5.01 The Eleventh Hour

Heavily damaged, the TARDIS crash lands in a rural area of England. As it begins to replenish its energies, the newly regenerated Doctor settles within his surroundings, and meets a young, feisty Scot, Amy Pond. He's forced to leave briefly, but when he returns, he discovers that an alien is on the loose and Earth is 20 minutes from extinction.