Article continues below advertisementSeason 5 of Only Murders in the Building has officially arrived, and with it comes a host of intriguing new characters stirring up chaos at the Arconia. This season, the investigation focuses on the unexpected death of Lester (Teddy Coluca), the building's doorman. Charles (Steve Martin), Oliver (Martin Short) and Mabel (Selena Gomez) will navigate this tangled web of mystery with the help of some exciting new cast members.Article continues below advertisementSource: Hulu/YouTube'Inglorious Basterds' star Christoph Waltz will play a tech billionaire.