This one sort of felt like filler to me. Not much happened to advance the story and while there are okay character moments, they didn't really contribute anything meaningful. I sure hope Grace's story line is something a bit more than self-sacrifice to prevent a nuclear meltdown, otherwise I don't get why they added her to the main cast for this season. Given how excited and upbeat Dwight is getting about finding Sherry, and John is staying quiet about the letter from her he found, I have a feeling this is going to end in Walker Sherry turning up, messing Dwight up completely. And at this point I will actually be surprised if Annie and her brothers don't eventually end up joining the gang anyway. It is kind of amusing how they try to provide details to Dwight's backstory without making any kind of direct reference to Walking Dead's Negan storyline. I mean, I get it, it's for the benefit of those who didn't watch Walking Dead and not confusing them, but it's amusing all the same. Not a credible in-universe reason, but I wonder if the storyline reason for Charlie going along is so she can form a bond with Annie or one of her brothers to convince them to join the gang. While that might work as a reason in the writer's room, yeah, in-universe one has to wonder why anyone would think it a good idea to bring a child along in a hot-air balloon flight into an area in danger of facing a nuclear meltdown. Actually, going further down storyline related reasons, since Sarah and Wendel aren't in the main cast, this now means everyone in the main cast aside from Daniel are now congregated in the same area. So, I wonder if they may be planning to write Sarah and Wendel out of the show and have Daniel randomly meet up with the gang at some point wherever their mutual adventures next take them? It would mean the whole Logan occupying their factory storyline is abandoned, but then that hasn't really been touched on since the premiere anyway.