Episode 4 (E04)

Suspended from duty and with Mack’s anniversary celebration looming, Ember is forced to confess to her family that human bone fragments were found in the boat hut. Devastated, Hannah can’t believe her dad was responsible and pleads with Ember to look further. Ember’s instincts tell her this isn’t a done deal. Doubling down, Ember is determined to finally get to the truth of what really happened to Amy. When a shocking new development propels Ember into dangerous territory, the truth is finally revealed, and it’s far more shocking than she ever expected. (BBC iPlayer)