BoJack Horseman Season 4 (2017) | TRAILER Season 4 of BoJack Horseman is back September 8! Meet the most beloved sitcom horse of the ’90s – 20 years later. BoJack Horseman was the star of the hit TV show “Horsin’ Around,” but today he’s washed up, living in Hollywood, complaining about everything, and wearing colorful sweaters. (Visited 6 times, 1 visits today)