Retired professor pilot with 35+ years. Many of the accidents and events in this 24 season series are well known and studied by aviation professionals. Many procedures have been implemented or modified based on recommendations from these investigations. Based on the accidents I am most familiar with, the series has always been extremely accurate including their computer graphics and expert interviews. I don’t believe it is an exaggeration that these documentaries have saved lives in aviation. Many of us should be grateful. We are.