Absolutely hated Gallinger towards the end, proper hatred but I think him not being caught up by karma is important as at the time he probably would have got away with all the shit he did. The series had so many great little historical nods, Gallinger going to Germany to preach eugenics, the 2 young heirs getting involved with Gasoline and the subways, and I especially loved Edwards starting psychiatry work with the addict, those final words of "tell me about them", really gave me a little smile.
Fantastic season and fantastic show, hope it's not done as this really could have some brilliant contextual story lines but at the same time don't want it to be stretched too far.