RTÉ Documentary On One acts as the primary investigative and narrative audio unit for Ireland’s national broadcaster. The team produces high-fidelity, serialized content that often influences real-world judicial outcomes, as seen in the Stolen Sister project which led to a public petition for justice for Elizabeth Plunkett. Their production style integrates cinematic sound design with original scores composed by Oscar winner Stephen Warbeck and performed by the RTÉ Concert Orchestra. Notable series like the chart-topping The Real Carrie Jade and Runaway Joe have secured international accolades, including the Prix Europa and IMRO Gold awards. Recent investigations like First Conviction, narrated by Ruth Negga, showcase a collaboration with RTÉ Investigates to uncover miscarriages of justice. For industry professionals, the unit represents an authoritative voice in public service media, utilizing archival research and field journalism to document both historical social shifts and contemporary criminal investigations that frequently cross international borders into Iceland and Australia.