Since the thumbnail pictures are slightly spoilery, I have placed the videos after the jump.
Here is the obligatory Ari Margolis (@jonxproductions) spoiler warning:
Going to step on my #Fringe soapbox one more time... As the final few episodes are filmed, stay away from any [spoilers]!!! I know it's tempting but I think you'll enjoy the experience more if you go into it un-spoiled! Just my two cents. And as always... #WatchItLive #Fringe