Only Murders in the Building season 4s ending wrapped up the mystery of Sazz Patakis tragic death, all while teasing what will come next for the shows central trio. Only Murders in the Buildings cast features Selena Gomez as Mabel, Martin Short as Oliver, and Steve Martin as Charles, three previously lonely true crime fanatics who came together to investigate a series of murders that took place within the titular building: the Arconia. Only Murders in the Building season 3s ending saw Sazz Pataki, Charles former stunt double and best friend, killed, setting the stage for season 4s story.