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Deadly Design: Quick-thinking Captain Frank Geib saved Northwest Airlines Flight 85 from a horrific disaster in 2002. What had gone wrong 35,000 feet in the air? 7+

Ice Jam: The Dawson City Fire Department races to protect the town from devastating flash floods. Conservation officers track down a dangerous and destructive bison herd. (S1, ep 6)

Smoke and Fire: Johnny Rolfe explores new territory, Chris and Jessi bring home dinner, the Millers harvest food and the Roach family recover from a sudden chimney fire. 7+ (S5, ep 4)

Philadelphia Ame Church: The team hit the jackpot in an abandoned church, finding a Tiffany-style stained glass window and the remains of a basement bowling alley. (S1, ep 12) 7+

The Secret Flame: A World War II searchlight seeks out the team in Colorado, where Sean also finds a simple Italian flintlock that hides a deep and valuable secret. 7+

Itchy Trigger Finger: Sean and his crackerjack team of military experts evaluate a medieval joust, a 17th century rapier, and two guns that don't appear to have triggers. 7+

Night Shift: Carrot Cake & Minestrone Soup: Bad soup sends a Toronto team back to the cutting board with two hours to go, and a New York bakery needs ingredients. (S5, ep 21) 7+

Night Shift: Korean Bbq Tacos & Summer Breeze: Ohio taco artists enter a competition, and a Toronto team struggles to create a custom dessert for a reputable client. (S5, ep 22) 7+

Fatal Attractions: The course of true love doesn't run smoothly for these creatures, who must take on deadly rivals and arduous journeys in their quest to reproduce. (S1, ep 5) 7+

Army of Ants: Made up of half a million ants, this Costa Rican colony stalks the forest floor. Hunting as one super organism, it's as deadly as any four-legged predator. (S1, ep 6) 7+

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Football Tragedy: Experts investigate the deadly gamble that caused LaMia Flight 2933 to crash. 71 people were killed, including Brazil's Chapecoense football team. (S18, ep 9) 7+

Slam Dunk: The charred remains of United Express Flight 6291 gave experts very little to go on. That's until the cockpit voice record revealed the smoking gun. (S18, ep 10) 7+

B17: From perilous daylight raids over occupied Europe to the road to D-Day, discover how the B-17 Flying Fortress became a symbol of Allied air power and WWII victory. (S1, ep 7) 7+

Lost Graves: Intrepid marine archaeologists shine a new light on graves long lost to the depths, coaxing secrets from their forgotten bones. (S5, ep 5) 7+

Historian Tim Maltin unearths compelling proof that the disaster of the supposedly 'unsinkable ship' was caused by unique atmospheric conditions and a fatal trick of the light. 7+

Shipwreck Coast: Dive into the Great Lakes as new science uncovers recent shipwrecks, including mysterious vessels lost beneath the waters since 1914. 7+

Welcome To Africa: Africa is a continent of extremes, where every habitat shapes the wildlife within it. To survive, animals must constantly adapt. (1 of 7) 7+

Jungle: Africa's vast jungles conceal extraordinary wildlife found nowhere else on Earth, thriving within a dense and untamed world. (2 of 7) 7+

Islands: From remote island havens to hidden natural worlds, discover Africa's most extraordinary creatures and the remarkable adaptations that help them thrive in isolation. (3 of 7) 7+

Desert: Stretching across almost a third of Africa, the Sahara is a world of extreme heat and harsh conditions. Discover the remarkable animals that have adapted to survive it. (4 of 7) 7+

Norwegian Nightmare: Moments after taking off from the Norwegian island of Vaeroy, a turboprop plunges into the North Atlantic. (8 of 10) 7+

The Lost Plane: Experts are baffled when the wreck of Thai Airways Flight 311 is found amid mountain peaks, miles away from its flight path. How did it end up there? (S16, ep 7) 7+

Stansted Crash: A look at the fate of Korean Air Cargo flight 8509. 4 died in the explosion near Stansted Airport, making it the airline's fifth accident in two-and-a-half years. 7+

Ireland: Hannah Fry goes beyond the pubs and parades to discover what it really means to be Irish today. (3 of 6) 7+

Earl of Essex - Fall of a Favourite: From royal favourite to condemned rebel, the Earl of Essex's spectacular fall from grace is re-examined. (S1, ep 4)