By Couch Baron
Harry gets in trouble for a snafu involving a poorly-placed television ad, and asks Roger for a subordinate to help read scripts and head off potential problems. Joan (who's almost surely pregnant, not that that's a huge surprise if you've been paying attention to her measurements) ends up taking over the job with not only her usual assured skill but also quite a bit of genuine enthusiasm. However, her success makes Harry look so good that Roger springs for a permanent subordinate, which royally pisses Joan off, although, she keeps it to herself for the moment.
Father Gill encourages Peggy to get more involved with the church, and enlists her for some PR help for an upcoming church dance. He then encourages her to talk to him about anything that might be bothering her, and he almost succeeds, but not quite.
Finally, Betty's being short with Don, which he thinks is due to nervousness about a important upcoming business dinner party they're throwing at their house for the purpose of schmoozing that guy from two episodes ago who did the Cuba campaign, but is of course because of Jimmy spilling the beans about Don and Bobbie. After the party, Betty finally straight-up confronts Don, and although Don tries to deny it and turn things around, Betty holds fast and calls him a liar as well as a cheat. Infuriated by his steadfast refusal to admit his guilt, she searches his things but doesn't find anything, so she changes tacks and asks if Don actually loves her. He tells her he does, and seems to mean it, but it isn't enough, and the day, she calls him at work and tells him not to come home, so Don stays at the office, powerless and alone.