Peggy spying on Don. She really, like, CARES about him right? I think he softened her up a lot at the end of last season. Plus she totally stood up for him and bitched out Allison.
Steve, if I'm right and they lost Lucky Strike I bet Don would bring back Sal immediately. I think Don was upset to lose him.
I think Peggy wants to/is becoming Don. She's on the same path careerwise, wants a perfect marriage/kids/life but also wants fun/weed/sex/excitement. Her dual personality trajectory is throttling forward at full speed.
I'd like to see Joanie join in a bohemian romp... it'd be fun to see Peggy be the one who can navigate the social situation with ease while Joanie is completely out of her element.
Steve, if I'm right and they lost Lucky Strike I bet Don would bring back Sal immediately. I think Don was upset to lose him.