USS Callister is probably my favorite BM episode. It just had everything going for it: funny, disturbing, well-acted, cool tech. Such a versatile episode that works on so many different levels.
Arkangel was probably the worst, both of this season and overall. Melodramatic, too long, not very interesting. I thought some of the tech callbacks to previous seasons were really well executed this season (such as the aspect of copying someone in USS Callister), but the whole blocking thing was just cringeworthy in how it was used in this episode.
I see that Crocodile has been divisive for a lot of people, but I really liked it. Yeah, there were some loopholes in terms of decisions that were made by the main character, but it did a good job at creating that claustrophobic feeling that you can't keep anything private, and even something inconspicuous in your past can be damning for you. I thought the scene where the memories started slipping out was really well done. The twist ending was just straight up bad though, not much else I can say about that.
Hang the DJ was technically sound and enjoyable to watch, but what the tech seemed to be wasn't intriguing at all to me. Reminded me a lot of The Lobster in terms of the world they built though. Just completely off-the-wall but hilarious. I think the twist does a lot to help tie everything together, although it was pretty predictable.
Metalhead was great for what it was, just a straight up survival horror. Tough to evaluate when there's no real meat on its bones though. The ending did a little bit to give more emotional merit to the story, but not much. Completely fine with having an episode like this sprinkled in though.
Black Museum was... interesting? I thought it was a poorly done version of White Christmas. The individual stories were great in Black Museum (although I thought the last one was easily the weakest of the bunch), but the way it was all tied together was just awful. White Christmas had that whole thing where the overarching story in the "hut" was just as interesting as the tales told throughout the episode, if not more so, but this one was just sloppy and uninteresting. "Yeah, that guy? He's my dad! Let's go, teddy bear lady!" Ugh.
All in all, it was certainly an uneven season, but I still thoroughly enjoyed in and think it's the most interesting TV show going right now.