Spoilers! If you have not watched the episode that aired last night this list will besmirch you. I'm super sick so please forgive if it's half baked and a regurgitation of @MirandaBerman
  1. Is Don insane? Like actually insane? What's with driving all the way to Wisconsin for a woman he doesn't even know?
  2. Oh my god windows and planes and windows and air filtering out of windows
  3. Peggy and Roger having the best last scene ever in the SC and P offices which were once SCDP offices
  4. Peggy walking into McCann like THE BADDEST BITCH ALIVE
  5. Betty reading Freud and completely changing her patenting style. What a great character arc. Can't wait to see her dump Henry next week (prediction?)