1. A Horse Walks into a Rehab

Complete story — includes the ending

BoJack initially struggles with rehab, but finds the motivation to excel when he learns that Sarah Lynn once was a patient in the same clinic. He accidentally helps teenage patient Jameson sneak out to go to a party and follows her out of guilt, eventually finding her at her father's house, who she claims neglects her in favor of his new child. As BoJack helps her smash up the house, her father arrives and she tries to blame it on BoJack. Her father sees through the ruse and explains that the baby is actually Jameson's, taking them both back to rehab. BoJack catches Jameson trying to sneak a water bottle full of vodka in and takes it from her. Throughout the episode, a series of flashbacks are shown in reverse chronological order, all of them involving BoJack and alcohol, revealing that the first time he drank was as a young child following a house party thrown by his parents.