In A Horse Walks into a Rehab, BoJack hears Jameson jumping out the window. He realizes she was trying to escape and catches up to her. Jameson says her friend McCaitlyn told her, that Jameson's boyfriend Dathan was going to break up with her because she gained weight during her junior year of high school. Jameson says she needs to show him she's hot again, get back together with him, then break up again, to show him how shallow he's being. BoJack says she does not need to do that.
BoJack decides to go with her, as he was the one who gave Jameson advice on how to escape. They wind up at Dathan's house party. BoJack says they should not go in as the house and yard looks trashed, and there are drunk teenagers everywhere. Jameson says she'll find Dathan, and crush him with her thigh gap, and then they can leave the party. Jameson calls out for Dathan.
BoJack later hears Jameson screaming. She caught McCaitlyn and Dathan making out on the couch.
BoJack then comforts a crying Jameson on the sidewalk, reminding her she was going to break up with her ex anyway. He also tells her that her friend sucks. Jameson says they are right and she is a mess. BoJack tells her she does not need to drink alcohol, she needs to go back to rehab, and sleep there. Jameson says she'll go to her real home and sleep in her own bed.
She says when her father discovers her, asking why she's not at rehab, she'll retort by asking him why he doesn't go to rehab for being a terrible father. BoJack tells her to come back to Pastiches as she promised. He then tells her, if she really wants to go to her dad's, she can steal Dathan's car. Before BoJack can even finish his sentence, Jameson is already driving off.
- Jameson insults her ex-boyfriend Dathan by calling him a "buck foy." This seems to be a spoonerism of "fuck boy," modified so as to not break the "one F-bomb per season" rule.