The old lady down the street, the teenager at the bus stop who forgot to bring a scarf when it's 5 below.

BBC: Can Canada teach the rest of us to be nicer?

In the latest special, Doctor Who: Planet of the Dead, the Doctor (David Tennant) must join forces with the mysterious Lady Christina (Michelle Ryan), when a London bus takes a detour to an alien world.

ENGADGET: BBC America HD launch July 20 brings plenty of science fiction starting with Torchwood & Dr. Who