Drowning Lesson

''It''s our son, Sam... someone took him. Please help us''

Emma hoped that she and her family would return from their year abroad closer, with memories to last a lifetime.

Instead, they returned minus one child.

A year on, Emma is haunted by the image of an empty cot, and feels further than ever from her husband.

Is their son still out there somewhere? Will the mystery about what happened that night e...