This episode exposes how Europe’s leaders fought over how to deal with the migration crisis that reached its peak in the summer of 2015. As hundreds of thousands of refugees and migrants arrive from North Africa and Syria, Europe divides. The decision by chancellor Angela Merkel, Europe’s most powerful leader, to keep Germany's borders open tests the fundamental principles of the EU to the limit. Top leaders, from Donald Tusk and Jean-Claude Juncker to prime ministers Matteo Renzi and Mark Rutte, and president Francois Hollande, reveal some of the biggest clashes the European Council has ever witnessed. As Europe is split over whether to share the burden of migrants or toughen up borders, a controversial deal with Turkey – aided by shutting down borders to keep migrants out of Europe – brings the crisis out of control. But the political damage is grave.