The Grey's Anatomy firefighter spinoff is heating up! The upcoming new ABC drama has cast four more actors to join Jason George (who will play his Grey's character, Dr. Ben Warren) and Jaina Lee Ortiz (Rosewood). Playing firefighters are Grey Damon (Friday Night Lights), Okieriete Onaodowan (Broadway's Hamilton), Danielle Savre (Too Close To Home) and Barrett Doss (Marvel's Iron Fist).