I finally got around to watching S4 this weekend and kicking myself for putting it off so long, USS Calister was such a good start to the season and didn't feel like any Black Mirror previous episode.
Arkangel was some serious helicopter parenting and I could see something like that actually happening in the future,
Hang the DJ and Black Musuem were also great episodes, didn't really care for Metalhead though it did have some great cinematography.