Part one: How can Emmanuel Macron, a political neophyte, govern in the Élysée Palace? (That is, if he beats Marine Le Pen in the second round of French presidential elections two weeks from now, as polls strongly predict he will.) And what will his victory mean for Europe's diminished political centre ground? Or for tortuous Brexit negotiations?

Part two: The attacks of "lone wolf" terrorists are impacting daily life and geopolitics across Europe from Paris to Istanbul. Could understanding the psychology of these men help prevent further violence and instability?

Guests: Paris Correspondent Lara Marlowe in Paris, Foreign Affairs Correspondent Ruadhan Mac Cormaic and Dr Paul Gill, a lecturer in Crime Science at University College London.