This special looks at accidents and incidents where pressurization failure or explosive decompression played a part. Episodes re-visited: 3x11-Hanging by a Thread, 2x01-Blow Out, 1x02-Unlocking Disaster, 4x08-Ghost Plane.

This special looks at accidents caused by seemingly minor defects or errors. Episodes re-visited: 1x06-Cutting Corners, 3x03-Out of Control, 2x02-A Wounded Bird, 1x04-Fire on Board, 4x05-Hidden Danger

This special looks at accidents and incidents where problems with the interface between crew members and onboard avionics were a factor, and the causes of those problems. Episodes re-visited: 1x05-Flying Blind, 4x06-Panic Over the Pacific, 3x07-Kid in the Cockpit, 4x07-Vertigo, 1x03-Flying on Empty.