Photo Credit: Giovanni Rufino / The CW
Okay, so Elizabeth Fisher was in on the Jack plot not because he had anything on her, but because she was in love with him: Lame. After Chuck whines at her for awhile, she rethinks and gives Jack an ultimatum, thinking he'll just hand the Empire back to Chuck: Lame. Nate and Serena do another dumb plan that's not even worth talking about.
She decides in the end to recapitulate history by leaving Jack even though he's into her (I think this is what happened, it went quite quickly) and once again saying she's not Chuck's mother... Even though she totally is! Exhilarating to sit through, but mostly a relief this part of the story's over. I was getting whiplash from all the "is she/isn't she."