This was probably one of the best Mad Men eps of all time and it really, seriously highlights the continuity in the show. Like, in that ep in season one, where they show Don back when he wasn't Don and he was at the army and he pissed himself and the real Don laughed at him and the lighter fell and real Don died, and here Don is all

at everyone for making fun of Freddie for pissing himself. And Freddie was wonderful. For a character that was at best peripheral they really made us feel

for him. And it's also nice to show how Don reacts to being used and abused! Maybe he will commiserate with Betty now.
Though if Roger isn't with Joan, I will be sad. It's like the only real relationship on the whole show. I know the cliffhanger indicated he was with Jane but it's also possible she was the one who told him about Don and that's why she ran off crying.
Oh and Pete is 100% rudo!
Also the double-entendre about the Man in the Grey Flannel Suit = glorious.