Hundreds of world leaders are gathered in Copenhagen, 2009, with high hopes of securing a historic climate deal. And the Chinese premier has gone missing. US President Obama rushes through the corridors of the conference centre - on a mission to gatecrash China’s secret rendez-vous with its allies.

This is just the final day of a two-week conference that has felt more like a thriller movie than an exercise in diplomacy.

How did one global conference expose the faultlines in international climate collaboration that are still seen today?

Presenter: Justin Rowlatt