Line of Duty twist with jaw-dropping clue spotted by couch detectives The fan of the BBC crime drama believes they have discovered another rotten apple in Jo Davidson's team The video will auto-play soon8Cancel Play now Sign up to the Hull Live newsletter for daily updates and breaking newsInvalid EmailSomething went wrong, please try again later. Sign up here! When you subscribe we will use the information you provide to send you these newsletters. Your information will be used in accordance with ourPrivacy Notice. Thank you for subscribingWe have more newslettersShow meSee ourprivacy notice An eagle-eyed fan of BBC crime drama Line Of Duty thinks they have discovered another rotten apple in Jo Davidson’s team who has yet to be detected – and cannot believe no one else has picked up on the same thing.