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Police break down the door of the Millers' family home. Teenage Jamie is arrested and taken in for questioning but insists he's done nothing wrong.

The police look for answers — and the weapon — at Jamie's school. They can't get any leads from his friends, until DI Bascombe's son offers to help.

Jamie meets with a psychologist. He's reluctant to speak at first, but eventually he opens up about his complex feelings towards Katie.

On Eddie's birthday, the Millers try to celebrate like everything is normal. But a series of upsetting events threatens to send the family over the edge.