Buh say wuh?

Ok, so I know I missed the middle of the season because of scheduling conflicts on the DVR, but I've watched all of the recent episodes and I gotta say... Thoroughly confused by the final episode to the point that I don't even know where to begin... Would someone smarter than me please summarize the important parts of Terminator: Sarah Connor Chronicles final season 2 episode? Because I am so lost. And is it just me or is it harder to tell if/when Weaver is lying than if/when Benjamin Linus is lying? I am sooooo lost.