Jason Bateman, Linda Cardellini and David Harbour in 'DTF St. Louis' Tina Rowden/HBO As Steven Conrad's suburban murder mystery unravels on HBO, he's reflecting on the real-life hookup app experiences that inspired him. The DTF St. Louis creator explained that he was influenced by hookup apps that he saw "destroy the lives of some friends" going through middle age, much like the characters in the limited series, which airs Sundays at 6pm.