Set against a sweeping Cornish landscape, two couples discover their toddlers were switched at birth in a hospital mix-up, and face a horrifying dilemma: do they keep the sons they have raised and loved, or reclaim their biological child?
Cast:James Norton , Niamh Algar , Alban Guo , James McArdle , Jessica Brown Findlay , Fraser Cornelissen , Sunetra Sarker , Theo Ogundipe , Sarah Edwardson , Alisha Bailey , Posy Sterling , Akbar Kurtha , Maureen Beattie , Rebekah Murrell , Phil Davis , Amy Morgan , Sam Hoare , Maxine Finch
Pete and Maddie's lives are changed forever when the hospital calls them in for a meeting to explain that their son Theo was mixed up with the child of another couple, Miles and Lucy. The families meet to discuss their future.
Pete and Maddie are shocked to learn that Miles and Lucy are going for full custody of both Theo and David, they learn quickly that Miles is ready to play dirty.
When Miles leaks the story to the press, the fallout hits Pete.
The conclusion of the psychological thriller series as the final court hearing looms.