Board Thread:False Info and Speculative Discussion/@comment-4772791-20160123002637/@comment-1757720-20160124035025

One possibility I thought of, is something closer to home. The Beast is Stiles, Theo claimed that the Dread Doctors having been using hidden writing for it to remember itself. Therefore, in the process of it gaining a consciousness and getting closer to its human state of mind, it isn't remaining in its transformed state indefinitly throughout the night.