Did you see it coming? The third season of Only Murders in the Building has finished, and the killer of action-hero-turned-theater-actor Ben Glenroy — played by the ever-hilarious Paul Rudd — has finally been revealed. Now, take heed, because serious spoilers lie ahead. So, if you’re not looking to know what went down this season, you better run like it’s a cold and rainy night at the theater and the ghost of Gideon Goosebury is after you… What happened this season on Only Murders in the Building?