I saw a longer teaser commercial for the finale. I believe I remember most of it, though I may get a few quotes, wrong, I believe this was the gist of it...It showed a lot of the same scenes as the teaser after the last episodes, except it also showed Vaughn calling after Syd in the Rotunda, obviously shocked (this may be where Lauren dressed as Syd sets fire to the Rotunda) and Syd walking away from the fire, then Vaughn talking w/ Jack, saying "Is she really capable of this!?", then Syd calling Vaughn on the phone, saying, (I think!), "You know I didn't do this"...and then some extra scenes of Vaughn grabbing Lauren and torturing her. Very interesting, a lot of the spoilers make sense here.