On the eve of the German federal elections, Andrew Marr examines the life and career of German Chancellor Angela Merkel. The broadcaster investigates her childhood and formative years in East Germany to learn what shaped her political vision and style, with Merkel only entering politics in her mid-thirties after the fall of the Berlin Wall. He looks at how her journey has been marked by caution and compromise, but with occasional flashes of ruthlessness and an unyielding commitment to the European Union.