Cruising at 37,000 feet over the Indian Ocean on a clear night, a brand-new Boeing 747 watched its engines glow an eerie blue, filled with sulfur-smelling smoke, and then went silent as all four engines failed one by one. What happens when the most advanced aircraft of 1982 flies completely blind into an invisible disaster?

This episode unpacks the astonishing true story of British Airways Flight 009, the City of Edinburgh, which flew into a dry volcanic ash cloud from Mount Galunggung. We trace the physics that killed the engines, the desperate glide toward Java, and the extraordinary human ingenuity of Captain Eric Moody and his crew that turned a doomed flight into one of aviation's greatest survival stories.

• Why weather radar was completely blind to the dry volcanic ash, which had no moisture for it to detect
• How molt ...