At last, an answer to one of the greatest unsolved cases in Australian crime history. Who killed Dr. Bogle and Mrs Chandler?

When the half-naked bodies of brilliant physicist, Dr Gilbert Bogle, and his lover, Mrs Margaret Chandler, were found in bizarre circumstances on a Sydney riverbank in 1963, it set into play an unprecedented forensic investigation. Autopsies offered little clue as to how the couple died, only that there were signs of a rapidly acting poison. Despite drawing on the expertise of the FBI and New Scotland Yard, the police could never identify the poison. At the end of a long and controversial coronial inquest, no cause of death, motive or killer could be identified. In the ensuing years, scores of tabloid theories have been put forward, from LSD to Cold War assassinations. But in the minds of many, including the police, Margaret Chandler's husband Geoffrey, was the likely culprit. Four decades later, this explosive documentary reveals startling new scientific evidence - evidence so powerful the police have given filmmaker Peter Butt unprecedented access to their forensic records.