I just assumed that with the merger and shuffle last season, it might have not been feasible for them to keep living together. Maybe due to the distance from the flat to their jobs. When Morse was back in uniform, he looked like he was stationed somewhere out in the sticks.
Thursday being injured like that had me too upset. He's no spring chicken and might not bounce back after an injury as a younger person would. I still hate seeing him and Win still at odds. It's easy to see why Win is still angry, not only was Fred not forthcoming about their life savings, but he's also still lying to her about little things i.e. how his hand got injured in the previous episode. It was extremely awkward to see them ignoring each other with Joan in the middle of them watching the moon landing.
It's nice to see that even though Morse didn't get on with Bright, he still is more respectful and deferential towards him than Box (who is still really awful). Bright definitely seems to miss being in the midst of all the action and keen to help out. Him and Fred's conversation by the vending machines made me miss their meetings back at Cowley.
Morse has never acted like that with Joan before, I guess this is supposed to cement his grumpy attitude in future. She was the second person to call him a prick in one episode.
I forgot to mention it in the last episode, but they really went all out on the soundtrack this series; couldn't have been cheap. I was also surprised that, show-wise, absolutely no one said anything about Morse's mustache. I would have thought Joan of all people would have mentioned it.