Board Thread:False Info and Speculative Discussion/@comment-24732895-20150630102249/@comment-4295751-20150706001237

And what did we see on screen? That Theo chased Liam and Stiles only after they headed back. So this throws a wrench into the whole "he knew it all along" theory, because there was no hint, support, or confirmation whatsoever, that he did. Based on what we see on screen, we can also assume that he realized them later. But we don't consider either fact, unless we know for sure.