I thought this season was fantastic, only cause tryin to follow up last season i knew would be a chore.
I still think Deb knows. I think she put two and two together, being a detective and all. 13th disc didn't work... Lumen clearly fit profile, dexter didn't mention her or how they met ever....
Deb dropped some potential hints after that.
So i still think next season, which is being rumored as the last season, something BIG will happen.