Jan. 17 (UPI) -- Showrunner Tia Napolitano is departing the CBS drama, Fire Country, at the end of the current fourth season. "Tia has been instrumental in helping both build and steer Fire Country , which not only became a top series, but is also the foundation of a growing universe," CBS Entertainment President Amy Reisenbach and CBS Studios President David Stapf said in a joint statement Friday. In her own statement , Napolitano said how proud of the show she is. "All of my gratitude to our