So it took me like five re-watches to fully notice this, but we got a fivesome scene in the intro. I like how we get kinda quick moments like that from time to time of the five of them sitting in the apartment (and doing equations in this case!) kinda like back in seasons one and two. And I like that they're shorter scenes because I certainly wouldn't want Amy and Bernadette to be excluded from longer, more significant ones, but every now and then a quick glimpse of them sitting there like that gives me feels.