Mayday, also known as Air Crash Investigation(s) in the United Kingdom, Ireland, Australia and Asia, Air Emergency or Air Disasters in the United States is a Canadian documentary television series produced by Cineflix that recounts air crashes, near-crashes, fires, hijackings, bombings and other mainly flight-related disasters and crises. It reveals the events that led to each crisis or disaster, their causes as determined by the official investigating body or bodies (often the American NTSB, as most aircraft involved are of American origin) and the measures they recommended to prevent a similar incident happening again. The programs use re-enactments, interviews, eyewitness testimony, computer-generated imagery, cockpit voice recordings and official reports to reconstruct sequences of events.
As of 9 May 2014, a total of 109 episodes of Mayday have aired, including five "Science of Disaster" specials and three "Crash Scene Investigation" spin-offs. Season 14 of Mayday will premiere in the UK on 5 January 2015. A 15th season has been announced and will contain 11 episodes, including a special. Production began on 8 December 2014 and will end on 12 July 2015.