Line of Duty show-runner Jed Mercurio has rubbished the theory that Chloe Bishop could be Tony Gates’ daughter, calling it "preposterous".Appearing on the Obsessed With… Line of Duty podcast, Jed spoke to presenter Craig Parkinson about some particularly pervasive fan theories floating about on social media.One of which is the idea that DC Chloe Bishop could be Tony Gates’ daughter.Tony was a Detective Chief Inspector at Central Police way back in series one.