TMDb/DTF St. Louis TV Discover how David Harbour's involvement inspired HBO's DTF St. Louis, a suspense series blending murder, betrayal, and hookup apps in suburban Missouri. April 26, 2026 AceShowbiz - DTF St. Louis centers around a murder mystery but owes its existence largely to lead actor David Harbour. More than just playing the victim, Harbour's involvement inspired creator Steven Conrad to develop this unique HBO limited series. Conrad, who wrote and directed all seven episodes, told TheWrap that he had been discussing potential projects with Harbour for some time.