For decades the UK government said there was no fallout at Christmas Island after its nuclear weapons tests. Then a whistleblower came forward, spurred on by Project Merlin, to reveal they had the evidence all along, and had covered it up. First reported by Susie, she and Jon discuss the ramifications of the whistleblower's secret report with veteran John Morris and Professor Kevin Ruane of Canterbury Christchurch University.

All the historic documents shown onscreen or in credits are Crown copyright and likewise usable under open licence, with personal data redacted.

In 1953, Britain detonated two atomic weapons in the Outback of South Australia. The purpose was to test how much plutonium was too much for the bomb to work properly. But after one blast an oily black mist was seen rolling across the landscape, covering Aboriginal camps with greasy ash, poisoning waterholes, and killing the wildlife. In the wake of it, Yami Lester went blind. Decades later he heard a scientist insist reports of a "black mist" were a myth, and Yami's testimony blew open the nuclear testing scandal. His daughter Karina joins Prof Liz Tynan to unpick newly-declassified documents that prove Totem was more toxic than Hiroshima.

All the historic documents shown onscreen or in credits are Crown copyright and likewise usable under open licence, with personal data redacted.

William Russia was a family man raising his grandchildren in the projects of Cincinnati when he contracted lung cancer, and unwittingly became one of the last subjects in a horrifying human radiation experiment conducted by US doctors, and believed to have been settled in the 1990s. Now research in the top secret Merlin database has found a link to the British military which was sharing information about the gruesome testing with allies, and requesting more. Susie and Jon discuss their findings with William’s granddaughter Toilynn O’Neal, and what it may mean for UK veterans fighting the government to access their own medical records with solicitor Oli Troen.

All the historic documents shown onscreen or in credits are Crown copyright and likewise usable under open licence, with personal data redacted.