Channel 4's groundbreaking films on Sri Lanka's Killing Fields sent shock waves across the world when they were broadcast in 2011 and 2012.
They were debated in parliament, praised by the UN and nominated for the Nobel Peace Prize.
The team behind those films has made a full-length feature documentary, No Fire Zone, which contains more devastating evidence and chilling eye witness accounts of those terrible events.
This special one-hour version of the documentary coincides with the controversial 23rd Commonwealth Heads of Government Meeting in Colombo, Sri Lanka, as Prince Charles, David Cameron and William Hague prepare to fly to Sri Lanka.
The film tells the story of the 138-day-long final offensive in this quarter-century-long bloody civil war.