Roger reenacting Megan's dance and song had me in tears.
You know how invested in these characters you have been after watching the past four seasons when you see a brief scene involving Peggy and her journalist boyfriend casually twisting by themselves and you just crack up. Then, someone who hasn't watched the show at all asks you "what's so funny?", while watching this episode and show for the first time.
Just a solid and hilarious return for Mad Men! This and Game of Thrones returning next week is just too good.