Veteran journalist Derryn Hinch has long been curious about the identity of his mother's father. His one clue, a childhood portrait of his mother Betty, leads Derryn to suspect her father was an English sailor. But on this episode of 'Who Do You Think You Are?', Derryn submits to a DNA test with heart-rending results. On his paternal side, Derryn discovers a shared bond with an intrepid matriarch, and the surprising war-survival story of an uncle he'd previously dismissed as merely a larrikin.