When the bodies of brilliant physicist Dr Gilbert Bogle and his lover Mrs Margaret Chandler are found in bizarre circumstances on a Sydney riverbank in 1963, the case captures the public imagination and launches an unprecedented murder investigation. However, the controversial coroner’s inquest finds no cause of death, killer or motive. Some theories suggest a Cold War assassination, others an overdose of LSD.

Now, four decades later, this explosive documentary reveals startling new scientific evidence and offers a stunning solution to one of Australia’s most baffling riddles: who killed Dr Bogle and Mrs Chandler?

A Film Australia National Interest Program in association with Blackwattle Films. Produced in association with the Australian Broadcasting Corporation. © National Film and Sound Archive of Australia.