When Billy disappears and Avery admits to killing six other children, everyone assumes he also killed Billy. His mother, standing by the window overlooking the Moors, is the only one convinced Billy is still alive.

Meanwhile, her grandson, Steven searches with his friend Lewis over the Moors looking for a possible grave, but all he finds is the bones of a sheep. What strategy can he use next to discover Billy’s whereabouts so his grandmother can find closure?

• Other 5 out of 5s