Yeah, there are a lot of things that don't make sense or that are glossed over in the writing. The problems were there in Season 1, but it's even more noticeable this season. But to answer a few questions you had: • In Season 1, when Codron arrived at Genet's headquarters, he saw them inject a test subject that was already a walker, and its head promptly exploded. So they knew they had some more fine tuning to do on the serum. • Daryl shot the walkers with the darts because he had seen injected walkers attack each other (when he and Quinn were in the arena fighting walkers in Season 1). He was gambling on those two walkers getting rid of the others. • They didn’t explore Carol’s Sophia trauma in the main show because they had a lot of characters to juggle and they chose not to spend time on it. When the showrunner asked Melissa McBride if there were any stories she would like to explore for Carol, she said she’d like to see Carol finally get closure regarding Sophia’s death. • The plane has a weight limit, and the fuel containers add weight. Since they have to carry all the fuel they need with them, it means the plane can’t carry as many people. Before the ZA, they would have would been able to get more fuel in Greenland or some other stopover between France and the US, but they can’t do that now. Carol told Ash her marriage was a bad one, so I don't think there was ever any intention of bringing “Ed” back. Carol thought it would only be Daryl, and Ash thought it would only be Sophia. • You're correct, it was the girl who killed Codron's brother. • You’re not the only one who expected to see Remy and his husband as one of the walkers behind the glass. I noticed that Carol paused and looked extra long at one walker. I thought for sure we’d see it was Remy, but they never showed its face. So I guess she was just making sure it wasn’t Ash. I agree it was a lost opportunity. • There’s no way they could have filmed Season 3 in secret. There are too many fans who track filming and they’re really good at ferreting out things like that. Plus, whenever they film on location, local fans get excited and start posting pictures and reports. • When Norman Reedus said 2x6 was the best episode ever, he’d just finished watching the rough cut of the episode in post (before they had completely finished it) and was super excited about how it turned out. So, yes, I think we should take his understandable excitement under consideration and keep our own expectations down a bit. lol