In our final episode we ask if there’s any chance of family reconciliation. And we remember Mary, missing now for 42 years.

Why is Mary's mother Mrs Boyle receiving hate mail?

Mary's sister Ann thinks she knows what happened to Mary. Her theory has divided the Boyle family.

Mary’s disappearance changed the lives of everyone she left behind. And the story of her father Charlie was to end in tragedy too.

Gypsy bands, paedophile rings and Volkswagen drivers; we look at the rumours and the theories that have swirled around the investigation.

We meet Mary's twin sister Ann and start to realise how hard it is going to be to tell this story.

It is March 18th 1977 – the day that Mary Boyle went missing. But how can a six-year-old girl vanish without trace from a busy family farm in the Irish countryside.

Kevin Connolly introduces the story of a life untold, following the disappearance of Mary Boyle over 40 years ago.