I'm so excited I finished the whole season, mostly because I can now hang out in this thread! Before Black Museum, I was going to say the quality of this season had dropped dramatically from the previous ones, but damn, they knew what they were doing when they put that episode last. USS Callister & Black Museum were head-and-shoulders above the rest, and seeing that one at the end made me feel retrospectively rosy about the whole season, honestly.
But what I mainly wanted to talk about was this: I wonder about Charlie Brooker's writing process, and whether he tends to write characters without gender or race and then either assigns those in a later draft or trusts the casting director to assign the best actor for the role. The casting for this season was exquisite (with the single and extremely distracting exception of Arkangel's "15-year-old Sara", sigh.) Whether it's happening intentionally or not, we're getting a nice broad range of female characters, for example -- from reprehensible murderers like Mia to avenging angels like Nish to the physically and mentally badass Bella in Metalhead. There's no plot-related reason any of those characters needed to be female, right? There's no plot-related reason Aldis Hodge's character in Black Museum or the investigator's husband in Crocodile needed to be black. (Obviously when there are kids involved they pay attention to casting within a plausible racial background, but otherwise, the field seems unusually open.) Which I like. It's great when TV tells stories that draw on a particular background or subculture, but it's also great to just see a more representative range of faces on screen, period.