Joe Otterson TV ReporterHBO is developing a drama series that boasts Lily Rabe among its executive producers.The project is currently titled “The Big D.” Set during a hot and hotly contested summer in Dallas 1980, the show follows a triangle of women as their lives collide to unearth a secret past involving the city’s would-be First Lady, Pat Pangburn, and her mysterious bout of amnesia.Samantha Buck and Marie Schlingmann will serve as writers and co-executive producers on the project.