Sarah Jane and Peter end up in a white room, a void where Peter tells her that he nearly died but the Trickster saved him and struck up a deal if he married Sarah Jane. He had no idea that any harm would be done to her or her friends. The Trickster explains his plan - to give Sarah Jane a new life so that she would forget her old one as a guardian of the Earth and make it vulnerable to the likes of him. The Doctor, K9, Rani and the boys have been trapped in a similar void but eventually make contact with Sarah Jane. Sadly, the only way for the Trickster to be defeated is for Peter to end the deal and to sacrifice himself. He was only living a half-life but marriage to Sarah Jane would have made it whole. Strengthened by his love for Sarah Jane,he agrees to his death in the knowledge that it will make the world more secure. Sarah Jane is understandably heart-broken but Doctor Who consoles her, telling her that she still has a wonderful life ahead of her and asking her never to forget ... Written by
don @ minifie-1
Did You Know?
Although David Tennant
's appearance in this episode as the Doctor is in the same chronology as the series Doctor Who, it was actually filmed several months after he finished filming "The End of Time Part 2," making this the last time he actually played the part of the Doctor. See more
I hope you're as good as Sarah Jane says you are. Well, you know journalists, always exaggerating. But yeah, I'm pretty amazing on a good day.