8. Mr. Peanutbutter's Boos

Complete story — includes the ending

The episode is told over four separate Halloween parties at BoJack's house, where at each party Mr. Peanutbutter takes a different partner. In 1993, he brings Katrina, his then-wife, who gets in a fight with him after he continually abandons her against his wishes. In 2004, he brings Jessica Biel, who fights with him after she sees BoJack dressed as a mummy, which invokes her fear of them. He takes Diane in 2009, where Diane, a big fan of BoJack, tries to talk to him just as he learns that Butterscotch died. Taking his reaction as a dismissal, she berates Mr. Peanutbutter for taking her to a party when he knows they make her uncomfortable, and he promises to never do it again. Todd, meanwhile, moves in with BoJack. In the present, Mr. Peanutbutter takes Pickles, but he upsets her when he cannot stop talking about his three ex-wives. Diane points out to Mr. Peanutbutter that his problem is his inability to mature as easily as his romantic partners often do, and she promises Pickles that she will be alright if she manages to get through the party.