This is "Mad Men", not "ER". Matthew Weiner doesn't typically do cliffhanging surprise endings.
I thought this past episode was excellent. From Don suffering the fallout from him being revealed to Sally in the previous episode to taking it out on his "work daughter" Peggy. The scene at the end when she called him a monster was incredibly well-wrought and reduced him into the same fetal position the audience found him in at the beginning of the episode.
Don's point to Ted was that they weren't fooling anyone, and it was affecting the account. Don has his "moments of clarity" where he's the Don Draper of old, and yes, it may seem ruthless, but it was appropriate. Peggy was angry, not only because she was protective of Ted, but because Don embarrassed her. Not to mention her ego was bruised and it was all wrapped up in the "Clio potential" for this genius idea she just had. Peggy can be just a ruthless as Don when you get down to it. She's found a "boss" she can run circles around in Ted, and she wants/needs someone to blow smoke up her ass and tell her how great she is, which Ted does, but Don rarely did.
The fact that Bob Benson was formerly a servant suggests some interesting possibilities. For example, part of the Bob/Manolo backstory could be that they met when they both worked for the same wealthy family. Perhaps they were fired because they were caught fucking each other, or because they were a couple of grifters who got caught ripping off their employer?
It also makes Bob's crush on Pete on a bit more plausible. He must have immediately sensed that Pete was a blueblood, and maybe Pete reminded him of a former employer he'd been in love with. Also, keep in mind that Bob doesn't know all the shitty things Pete has done over the years, which we viewers know all too well. Bob Benson as a kind of Don Draper mystery man in training is a brilliant idea. I thought James Wolk did a masterful job of letting the "Bob Benson" façade drop at moments to see the darker side of his character come out. I very much see this character sticking around and serving as a tour guide for Stonewall/gay liberation movement that occurs in '69.
There have been references to violence all season that I expect will play out in the season finale (and could deliver the surprise you've been waiting for, Greg).
Fun fact: Liam Aiken, who played Susan Sarandon's son in Stepmom, appeared as "Rolo" in the last episode, Glenn Bishop's friend who make an unwelcome advance on Sally.
"The mantle of spinsterhood was definitely in her shoulders. She was twenty five and looked it."
-Gone With the Wind by Margaret Mitchell