Hello, I have a question. I am new at this since I slipped 5-9 (Peter Davison to Tennant). I just got back to watching it. Can someone PLEASE explain why the deleks (journey's end, part 2 you tube) said that when the tardis went to the center of the core that the tardis and "the last child of gallifrey (a.k.a. Donna)" will parish. This is before Donna touch the hand! This was when she was just human! Does anyone have a clue? I am sorry but I could use some information. Thanks!