BoJack Horseman is a washed-up sitcom actor from the 90s, still chasing relevance and grappling with his deep-seated unhappiness. He wants fame and validation, but his self-destructive tendencies constantly sabotage him. His agent, Princess Carolyn, a driven cat, wants to revive his career. Diane Nguyen, a writer and BoJack's friend, seeks purpose and truth. Mr. Peanutbutter, a cheerful dog and Diane's husband, wants constant positivity.

The season centers on BoJack's pursuit of an Oscar for his role in Secretariat, a film that brings him both critical acclaim and intense pressure. This leads to a series of personal crises, including a near-confession about his lack of actual acting in the film and a disturbing encounter where Ana Spanakopita sexually assaults BoJack. A major turning point occurs when BoJack discovers a dead orca in Cuddlywhiskers' pool, hinting at darker secrets. The season culminates in a devastating drug bender with Sarah Lynn, resulting in Sarah Lynn overdosing and dying.

Distraught by Sarah Lynn's death, BoJack drives into the desert, seemingly contemplating suicide, but stops upon seeing wild horses.

Season 3 of BoJack Horseman covers episodes 1-12. Here's everything that happened:

Season 3, Episode 1: Start Spreading the News - BoJack is in New York doing press for Secretariat, guided by Ana Spanakopita. Princess Carolyn pushes Mr. Peanutbutter to find new work. Todd accidentally stows away with BoJack. BoJack almost reveals he didn't actually act in Secretariat to a reporter. Ana ominously says she's "handling it" after BoJack's near-confession.

Season 3, Episode 2: The BoJack Horseman Show - In 2007 flashbacks, Princess Carolyn gets BoJack a role in "The BoJack Horseman Show" pilot. Diane meets Mr. Peanutbutter. BoJack clashes with Cuddlywhiskers over the show's direction, leading to major creative changes. The episode ends as the pilot begins filming with a changed tone.

Season 3, Episode 3: BoJack Kills - BoJack and Diane investigate a potential frame-up after a text from a dead Whale World dancer surfaces, reading "BoJack is going to kill me". Their investigation leads them to a former Horsin' Around co-star running a heroin operation. Meanwhile, Mr. Peanutbutter and Todd get sprayed by a skunk. The episode concludes with BoJack and Diane finding Cuddlywhiskers, who reveals he abandoned his old life to pursue happiness, leading them to discover a dead orca in his pool.

Season 3, Episode 4: Fish Out of Water - BoJack attends an underwater film festival to promote Secretariat, but mostly tries to apologize to Kelsey. He ends up helping a seahorse give birth and caring for a baby seahorse. BoJack misses the premiere and his apology note to Kelsey is ruined by water, leaving his efforts meaningless.

Season 3, Episode 5: Love and/or Marriage - Fresh off Secretariat's success, BoJack crashes a wedding rehearsal, leading to chaos when he inadvertently sways one bride to doubt her marriage. Princess Carolyn juggles disastrous dates but connects with Ralph Stilton. Diane, after getting high with a client, reveals she's pregnant with Mr. Peanutbutter's baby. The episode concludes with Diane's shocking pregnancy reveal.

Season 3, Episode 6: Brrap Brrap Pew Pew - Diane and Mr. Peanutbutter decide to get an abortion, leading Diane to accidentally tweet about it from Sextina Aquafina's account. Sextina embraces the publicity, planning a fake live abortion. Meanwhile, BoJack deals with awards season politics and Ana Spanikopita sexually assaults BoJack. Diane gets an abortion, and at the end of the episode, Sextina reveals she is actually pregnant and plans to keep the baby.

Season 3, Episode 7: Stop the Presses - BoJack tries to cancel his newspaper subscription and receives life advice from "The Closer". Todd and Emily start a female-only ride-sharing company. BoJack spies on Ana, realizing she's just a sad, lonely person. The Secretariat billboard ad campaign fails when it reflects only the sky.

Season 3, Episode 8: Old Acquaintance - BoJack vies for a role in David Pincher's film. Diane meets Mr. Peanutbutter's brother. Princess Carolyn navigates Rutabaga Rabbitowitz's sabotage attempts. Todd takes his business in a new direction. BoJack considers Kelsey's project. The episode concludes with BoJack weighing his options.

Season 3, Episode 9: Best Thing That Ever Happened - The episode alternates between 2007 and the present. BoJack fires Princess Carolyn at Elefante, leading to a heated argument about their codependent relationship. Flashbacks reveal their first sexual encounter after Horsin' Around's cancellation. Despite their harsh words, they help the restaurant impress a food critic. Ultimately, BoJack upholds his decision, leaving Princess Carolyn unemployed.

Season 3, Episode 10: It's You - As Mr. Peanutbutter announces Oscar nominees, BoJack throws a massive party, alienating his friends. Diane warns him about his happiness, and BoJack drives his Tesla into the pool. Todd confronts BoJack, stating, "You are all the things that are wrong with you," ending their friendship. BoJack is left alone.

Season 3, Episode 11: That's Too Much, Man! - BoJack and Sarah Lynn go on a drug bender, crashing an AA meeting and attempting amends with those BoJack hurt. The pair visit Penny, causing her distress. At the Griffith Observatory, Sarah Lynn overdoses. BoJack delivers a nihilistic speech as Sarah Lynn dies.

Season 3, Episode 12: That Went Well - Distraught over Sarah Lynn's death, BoJack attempts Ethan Around, but leaves, fearing he'll negatively influence his young co-star. Todd gains and loses millions, while Princess Carolyn becomes a manager. BoJack drives into the desert, seemingly attempting suicide, but stops upon seeing wild horses.