Chapter 2: Meanwhile, back in Narnia
Aslan knew that the kids were coming. He also knew that their world was in danger. The white castle would be much easier to capture without the White Witch in it. So they went and captured it, rescuing Edmund and Mr. Tumnus, as well as all other captives. Aslan then led them to a place in Cair Parvel where they would go back to their world and face the White Witch themselves. He could not enter in this form, but he could enter in another form. He changed to that form and followed them there while Narnia would be protected and ruled by the Emperor over the Sea (Author's Note: For those of you who don't know who that is, it's Aslan's father who is only mentioned in the book) until Aslan came back. In the meantime, Earth was being taken over by a completely different force.