It's a macabre paradox, but almost every advance in aviation safety has been driven by a crash. After every crash, investigators determine its cause and scientists make every effort to ensure the same mistakes never happen again.

Panorama talks to pilots who have almost passed out at the controls and passengers who say they've been made ill by toxic fumes. The air breathed on airliners is drawn past the engines and can become polluted by any leaks of engine oil. 'Fume events' are rare but there are no accurate figures of just how many occur each year. Panorama wanted to discover what was really in the air passengers, crew and pilots breathe on planes

Back in the 1930s, two giant airlines began to span the globe, flying firstly mail and then passengers around the world. Pan American flew to Latin America and eventually across the Pacific to Asia.

Flying enthusiast and broadcaster John Sergeant celebrates the 75th anniversary of the Spitfire with a TV love letter to this most British triumph of design and endeavour. The film follows the story of a Spitfire from birth to retirement and tells the stories of ordinary people with extraordinary tales.