I've written in depth reviews of the first four episodes of Season 4 and I'm planning to write the remaining two soon.
If you're interested check them out here:
https://steemit.com/blackmirror/@g-com/black-mirror-season-4-reveiws-episode-1-the-uss-callister
https://steemit.com/blackmirror/@g-com/black-mirror-season-4-reviews-episode-2-archangel
https://steemit.com/blackmirror/@g-com/black-mirror-season-4-reviews-episode-3-crocodile
https://steemit.com/blackmirror/@g-com/black-mirror-season-4-reviews-episode-4-hang-the-dj