The Last Witness - 10. The Apex Stone

In a finale of discoveries, Dan and Lucy speak to Douglas's best friend and finally learn the truth about his stories.

They are moved to test their own blood for PCBs. When Douglas talked about 'the children... and the children's children...' Do you get it now?

At Douglas’s grave, the 'apex stone' is revealed.

Buried is the award-winning true-crime series digging into some of the most disturbing environmental stories in history. In this new investigation, reporters Dan Ashby and Lucy Taylor team up with the film star Michael Sheen. Together, they dig into the unseen files of a man who said he was beaten up and put under police protection, after alleging that a chemical had contaminated the food chain.

Produced and presented by Dan Ashby and Lucy Taylor Research by Georgie Styles Additional research by Grace Nicholls and Cardiff Journalism School Sound design and mixing by Jarek Zaba Original music and sounds by Phil Channell Executive Producers: Philip Abrams and Anita Elash Commissioning Editor: Dan Clarke

A Smoke Trail production for BBC Radio 4