So I hadn't watched since episode 7, I caught up with the rest of you now. Surprise that Isaac was killed, he had become the most interesting part of the season and his interactions with Dexter since the gay bar were really really good!
Deb probably did poison herself and to Adami's point, yes Hannah knows everything, but so does Deb and Deb doesn't have the social stigma Hannah does so that may work against her. Plus, Deb is the Lt. of homicide.
Can Quinn go and die already?! I never liked his character but God does he get stupider and stupider with each season.
I don't like that Dexter realized there was no "Dark Passenger", means that he doesn't have to adhere to Harry's code which makes him just another killer which will mean his downfall.
LaGuerta's investigation, while right, became an obsession and something that (from Matthews POV or anyone else not named Dexter or Deb) makes no fucking sense so I enjoyed Matthews being the way he was with her. Also, I don't know how that will be handled but I'm intrigued, if Dex does kill her that will probably re-open the BHB case and Deb would have to go hunting for Dex which would be a pretty nice plot for the last season.
Jennifer Carpenter, I hope you get some award recognition because you have deserved it this year.