: BoJack discovers through Beatrice’s past that Hollyhock is actually his half-sister, fathered by Butterscotch with their maid, Henrietta. After tracking down Henrietta's contact information, he delivers it to Hollyhock’s eight adoptive fathers. The season ends with BoJack smiling—a first for a finale—as Hollyhock tells him she "never had a brother".
: Todd meets Yolanda Buenaventura, an executive from the Better Business Bureau, and discovers they are both asexual, hinting at a new potential relationship. Metatextual Details [S4E12] What Time Is It Right Now
: She successfully pitches a new television series titled Philbert to executives and manages to get BoJack to star in it, patching up their professional relationship. She also begins considering adoption. : BoJack discovers through Beatrice’s past that Hollyhock