Lane didn't send any letters. The partners want to expand to a second floor and need an extension of credit. Joan and Bert ask the bank for one, but Joan gets a letter saying they already have one, or possibly denying it outright/asking for repayment in full. The partners wonder why Lane took out an extension.

Early reviews say that Don has a toothache. Trope alert? I think he goes to the dentist and needs a root canal, then hallucinates that Lane is the dentist. "Just relax, Mr. Draper. If you feel lightheaded, don't worry. That's relief." Don has tried to move past the suicide faster than everybody else, but will spend the episode reflecting on Lane. This might be a big backstory episode. Don goes to Rebecca to either ask about Lane or to talk to her about the insurance or partnership shares.

Pete gets a call from Beth who says she's pregnant and it's his. He and Howard might get into a physical fight.

Roger has an unexpected reunion, but I don't know who. Mona?

This episode is also supposed to have a sex scene and a montage set to a James Bond theme song. Supposedly we'll feel like we're getting the old Don back.

I'd like to see Don give the firm some real closure and explain Lane's motivations.