When the naked, crumpled body of gifted American mathematician Scott Johnson was found by two fishermen at the base of the soaring cliffs at Sydney's North Head in December 1988, police instantly dismissed the death as a suicide – a theory they doggedly held for nearly 30 years. Scott's older brother, Steve Johnson, was certain that his sibling had met with foul play, and hired an award-winning investigative journalist to look into Scott's death. This journalist later revealed a raft of convincing new evidence – which the police resisted.

In this episode, Steve Johnson describes his long fight for justice, how a veteran detective finally cracked the case, and the phone call Steve had been waiting three decades to receive: telling him that a man was to be arrested for the alleged murder of his brother. It was an arrest that would draw international headlines.