Personally, I felt like this episode was really rushed. By that I mean, that the whole leaving the tower seemed like something that would happen over the next chapter and not all at once. Also, it felt strange that they were able to get back to The Tower so easily. Don't get me wrong, I liked the episode, but it seemed like too much happened too quickly. Maybe that was the point, that they were in a rush, and didn't leave properly, but still to get back home in the same episode they left seems odd.