The episode leans on reruns of earlier moments, which is nostalgic the first time and less so the fourth. It is the kind of episode where every glance is evidence and every sandwich is probably a clue. Someone says "When it comes to Wales, I'm not going to back down." with a completely straight face, and it works. It also finally answers a question from E19, "Why don't you just forget about Askeladd and surrender?", so patience pays, eventually. A steady, satisfying watch.