Season 21

On May 25, 2002 — China Airlines Flight 611 (Boeing 747): Twenty minutes after leaving Taipei for Hong Kong, a jumbo jet vanishes from radar over the Taiwan Strait, and the answer lies buried decades in the past.

On Dec 21, 1988 — Pan Am Flight 103 (Boeing 747): Four days before Christmas, a bomb destroys a jumbo jet over the Scottish town of Lockerbie, launching one of the largest criminal investigations in history.

On Sep 8, 1989 — Partnair Flight 394 (Convair 580): A charter carrying shipping company employees from Oslo to Hamburg suddenly dives from 22,000 feet into the sea, and the wreckage tells a troubling story.

On Nov 12, 1996 — Saudia Flight 763 (Boeing 747) & Kazakhstan Airlines Flight 1907 (Il-76): Two airliners converge in the evening sky near Charkhi Dadri, India — the deadliest mid-air collision in history.

On Apr 4, 1975 — USAF C-5A Galaxy: In the final days of the Vietnam War, the first flight of a mass evacuation of orphans suffers a catastrophic failure shortly after leaving Saigon, forcing a desperate emergency landing.

On Aug 6, 2005 — Tuninter Flight 1153 (ATR 72): En route from Bari to the island of Djerba, a turboprop's engines fall silent over the Mediterranean, forcing the crew to ditch within sight of the Sicilian coast.

On Jan 1, 2007 — Adam Air Flight 574 (Boeing 737): A New Year's Day flight vanishes over the Makassar Strait in Indonesia, and the hunt for wreckage and answers exposes an industry under strain.

On Oct 31, 1994 — American Eagle Flight 4184 (ATR 72): Holding in freezing drizzle above Indiana on the way to Chicago, a commuter turboprop suddenly rolls out of control, and icing research itself goes on trial.