Harriet Jones and Mr Saxon...
Nine said that Harriet Jones would be elected for three terms, but later in Christmas Invasion Ten told her he could bring her down with six words, which he did, and soon we saw her facing a vote of no confidence. And now Mr Saxon (WHEEEEE!) is the new PM. Does that mean if the Doctor had not brought down Harriet Jones, Mr Saxon would not have been the PM? So the Doctor is playing an even more important role in Saxon's plan than I realised! He's at least partly responsible for Saxon's reign of terror! Wheee!