This more emotional approach to the character, combined with Tennant's great charm, drove the series to the heights of popularity, re-establishing it as a vital part of British culture, and opening the door to the global success it enjoys today.
In the clip below, Rose and the Doctor find themselves on an impossible planet, one that is a stable orbit around a black hole. They soon uncover the planet is actually an ancient prison, designed to hold the Beast, a powerful being that claims to be the basis for the Devil in all religions. Cut off from the TARDIS, the Doctor encounters the Best while Rose escapes in a rocket:
Back tomorrow with our final instalment!