Petra Kelly has been described as one of the most influential women of the 20th century. As founder of the mould-breaking German Green Party she helped to make environmental protection a political issue around the world. She was also a passionate peace campaigner and is credited with helping to shape modern Germany. By contrast, her death was a squalid affair. Her body, and that of her army general former lover, lay undiscovered in a house for three weeks.
After intense speculation - including both assassination and suicide pact theories - police concluded that Gerd Bastian shot her before turning the gun on himself. Tonight, Isobel Hilton traces the rise, fall, and violent end of Petra Kelly, and looks at the vacuum her death has created in German politics.