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Battle for Stalingrad: As Hitler sets his sights east, waves of German bombers obliterate the Soviet city of Stalingrad. (S3, 4 of 6)

Battle of Berlin: As the war reaches its endgame, the Western and Soviet Allies race to take Berlin, the heart of Nazi Germany. (S3, 5 of 6) 7+

Battle of Kursk: Hitler gathers 800,000 Nazi soldiers to launch a major attack against Stalin and aim to eliminate the Red Army. (S3, ep 6 of 6) 7+

Taxiway Turmoil: The pilots' personal lives come under scrutiny after eight people are killed in a two-plane collision on a foggy Detroit runway. (S19, ep 4) 7+

Runway Breakup: The pilots blamed bad weather when their plane slammed into the ground, but investigators discovered a very different cause of the crash. (S19, ep 5)

Icy Descent: Investigators struggle for answers when a crash off the Patagonian coast kills everyone on board. Then, a microscopic filament provides a vital clue. (S19, ep 6) 7+

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Teleshopping.

Teleshopping.

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Glacier Express: The Glacier Express train in the Swiss Alps is an engineering marvel traveling over treacherous gorges and through huge mountain ranges. 7+

Australia's Outback Railway: Luxury train the Ghan and its 3,000 kilometres of track need constant and skilled maintenance as they traverse the Australian outback. 7+

Check out hotels that tumble. Take a tour of some of the world's most expensive and useless airports and learn why a Shanghai apartment tower dropped like a slab. (S2, ep 4) 7+

The Gate Keepers: At Michigan's Soo Locks, crews battle ice and extreme conditions to keep one of America's busiest shipping routes open. (S1, ep 3) 7+

Mission Disaster: After losing two engines near enemy territory, US Air Force pilots abort their refueling mission and attempt to land their damaged plane. 7+

Caught In A Jam: A commuter turboprop slams into the side of a hill in New Zealand, and the search for answers inevitably leads to the cockpit. 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+

Fire In The Hold: Investigation into the fire that consumed the cabin of ValuJet Flight 592 in 1996. Everyone on board died when the plane plummeted to the ground near Miami. 7+

Fight for Control: A look at Reeve Aleutian Airlines Flight 8's crash. Pilots lost control of the plane after a flying propeller tore a hole in its fuselage. 7+

Beach Crash: Looks into the crash of Chalk's Ocean Airways Flight #101. Rocked by an explosion 500 feet up, the aircraft plunged into the ocean leaving no survivors. (S8, ep 8) 7+

Fatal Climb: A look at the crash of West Caribbean Airways Flight 708 in 2005. Faulty engines and bad weather caused the plane to stall, plummeting 160 people to their deaths. 7+

Buried Battleship and Viking Victims: Archaeologists uncover a buried ship in New York, Viking victims in England and hidden traces of wartime resistance in Poland. (S1, ep 7) 7+

While exposing the Ocean's biggest challenges, Attenborough's message is one of hope: the opportunity for marine life recovery on an unprecedented scale is within reach. 7+.

Sir David Attenborough narrates an astonishing underwater look at the ocean giants thriving in the coldest place on Earth, Antarctica. Among them is a huge and legendary squid. 7+

Fatal Test Flight: After an extensive retrofit, three Airborne Express pilots board a modified DC-8 cargo plane for a routine test flight that ends in disaster. (S24, ep 9 of 10) 7+

Operation Babylift: A tragedy from the Vietnam War, when more than 250 children, who were being airlifted to safety on a US Air Force C5A Galaxy, died in a mysterious explosion. 7+