Sink or Swim

S1 E1: 1956 in the Midland town of Brinford: The remains of a young boy, possibly thirty years old, are found in a disused mine by a dog-walker. At the same time Gina Dawson reports for duty as the first female constable at the town's police station and is greeted with hostility by Chief Inspector Nelson and patronised by sexist Sergeant Fenton