I missed it but uh, caught it later...
Anyway, pretty good episode. I really liked all the specialized memories for each person about their best moment in medicine. It was fun to see their priorities and quirks come out in each one. Also really nice to see Dr Wen back, if only for a flashback. According to IMDB, this appears to be the first episode he's been in since three quarters through season three, and that seems to ring true in my memory. I've missed his character though, I always liked Turk having a sort of mentor too, and some of the drama/comedy based around the surgery team. Hopefully he'll be back, unless I missed something and his character officially left the hospital or something.
Another note though, with my continuing interest in seeing these characters truly evolve, isn't this like the billionth time that Dr Cox has been forced to face his relationship with JD and let go a bit? It's a good sentiment, but I feel like it's been done.
I missed the Matthew Perry one as well, but haven't gotten to watch it yet.