Not really, unless you count the episode with him killing Etta.
I just liked the Observers a lot more when they were mysterious intruders with powers and an agenda we didn't know much about. The more we got to know, the less I liked them as a whole as a concept. I never really got the invasion part...
I suspected Nina was a goner the moment she turned up. To be fair, I thought Astrid would 'take a bullet' for the team as well. It was a given that someone had to be sacrificed to turn op the emotional stake in the audience.
Yep, September/Douglas had killer looks and I enjoyed his sorta subdued mannerisms and voice. He reminds me of David!
Favorite thing of mine in this season along with Etta.
Walter walking into the future and giving that look to Peter and seeing them giving eachother that hug when they accept what Walter is destined to do.