I binged S04 this past weekend. I agree about the repeated themes, and the “hosted consciousness” theme gets a lot of play this season, but I thought it was all pretty great. MetalHead was the most affecting to me. S03 Hated in the Nation (the bees) is still my all-time fav, slightly edging out David Cameron and the Pig.
Bonus for me: I just found out there’s a Christmas special episode that I’ve never seen.