Happy Valley viewers have all been left with one issue that was never solved in the nail-biting series finale.
BBC One viewers tuned into the gripping grande finale as watched Sergeant Catherine Cawood take on her final mission, which saw her have one last showdown with dangerous crook, Tommy Lee Royce.
And throughout the this series of the hit drama, eagle-eyed were speculating as to why PE teacher Rob Hepworth's daughter Poppy never removed her coat throughout the entire series - a theme which has since prompted several different fan theories.
