Well, it's Valentine's Day, following the typical one month jump (on the show's timeline) between Mad Men episodes, and it's a day of personnel shifts around the office, heartbreaks, frustrations and embarrassment for a lot of folks. We'll start with the best stuff in the episode, which is by far the strained, and by the end of the night what looks to be repaired, relationship between Don and Sally.
After the ambiguous yet possibly understanding final glance shared between the father and daughter at the end of last season's finale, Sally is back in this episode, traveling with her boarding school friends into the city for a funeral. The funeral of her roommate's mother, which the girls seem to be pretty callous and dismissive about, mostly excited to go shopping in New York (Sally even says she'd do anything to get Betty in the ground... you're not alone, Sal). But when they're on the train headed back, Sally realizes she lost her purse and ditches the group, showing up at SC&P looking for Don. She's stunned to find Lou's name on her dad's door and the old man treats her pretty crudely, telling her to go find him at home. When she does, Don comes back to of course immediately lie to her, saying he left the office early because he's feeling sick. Bad move, Don. The familiar feeling of anger and disappointment with her dad's dishonesty sets in, and Sally instantly shuts down.
But it turns out that Don's been getting at home visits from office Dawn (in between lounging around watching Little Rascals shorts), who he's paying extra to keep him up to date on what's happening in the office, and Dawn manages to call him about Sally's visit right before he takes her back to school. Now Don's angry at Sally for letting him lie to her and the two share a stony drive back to the school, at least for a while, before Don finally confronts her about it, accusing her of acting like Betty (who we still don't see in this episode by the way). That's the wrong thing to say again, and Sally admits she wanted to embarrass him as much as possible by catching him in a lie, also telling him how hard it was to go to his apartment and risk running into Sylvia (who she says makes her want to vomit). Don is somewhat cowed by her honesty and takes a detour, pulling into a diner where he finally attempts to be honest with his kid. He admits to her he lost his job for telling the truth and lets Sally question him about everything, including whether he still loves Megan (he says he does) and why he won't just confess to wanting to stay in New York. This rare and candid talk from him finally breaks down her defenses and she calls her friends to tell them she's with her dad and even laughs at his joke about wanting to skip out on the bill. At the end of the episode when Don drops her off with a note she wishes him a Happy Valentine's Day and tells him she loves him, which he's taken aback by- and that my friends, is the closest you'll ever get to something approaching what could be considered a "heartwarming" Mad Men moment. Kiernan Shipka was as usual, fantastic in this episode, totally holding her own with Jon Hamm, and the Sally/Don bond is quickly becoming the core of the series as it nears the finish line.