Eiffel Tower: Building the Impossible
9pm, BBC Four
On 31 March 1889, 56-year-old engineer Gustave Eiffel refused to allow anyone else to unfurl the French flag at the top of his greatest masterpiece 300m above Paris. With the world’s eyes on the city again, this in-depth documentary tells the epic story of its “iron lady”, delving into architecture in the Industrial Revolution, Eiffel’s previous creations and his ambition to make the highest tower in the world. Hollie Richardson