BBC. In the first of the four free interactive episodes, the new Doctor and his companion find themselves in a destroyed version of 1963 London, battling (shock of shocks!) the Daleks.
For those who aren't up on their Who, almost the entire series is now on Netflix -- available on demand through all current consoles, personal computers and TARDIS interfaces. The new series is currently airing on BBC America, Saturdays at 9PM. Interested web travelers will find a trailer for the game embedded after the break.