'Only Murders in the Building' Season 4 Cast Changes: 7 Stars Returning, a Few Unknowns, & Many Big Names Are Joining! July 8, 2024 Cirrkus Only Murders in the Building season four is set to debut next month, and we’re bringing you all the latest info! This season will be the show’s most star-studded season to date. Keep reading for everything we learned… Share This Article