Seven months since a Malaysian airliner disappeared mid-flight, there’s still no trace of the Boeing 777. Now, the PBS science program NOVA is investigating the mystery and showcasing technology designed to ensure we never lose track of an aircraft again.  

Miles O’Brien is a producer at NOVA and the narrator of "Why Plane’s Vanish," which premiers Oct. 8 at 9 p.m. on WGBH.