The Bogle-Chandler mystery is recognised as one of the most baffling cold cases in the annals of crime. The victims, brilliant physicist Dr Gilbert Bogle and Mrs Margaret Chandler, the wife of his colleague, were found dead beside a picturesque river in Sydney, Australia. Investigators found no evidence to suggest how they had died. The bizarre manner in which the bodies were covered only added to the mystery. The police immediately suspected Geoffrey Chandler as the killer. But despite drawing on the expertise of police and forensic agencies around the world, the coroner was unable to determine how the victims met their fate. In his multi-award-winning documentary and book on the case, filmmaker Peter Butt presents new evidence, which finally provides a solution to the mystery.