National Geographic Channel

'World's Greatest Train Journeys From Above. S1/E2 - Canada's Wilderness Railroad'. The Winnipeg to Churchill train crosses the province of Manitoba along a route that requires determination, force, and fire to keep it running.

'Life Below Zero: Port Protection Alaska. S6/E1 - The Perfect Bear'. As the community of Port Protection springs forward, Squibb and Troy join forces to repair a sinking float that could cause a massive oil spill.

'S2/E5 - Buried Secrets Of The Gold Rush'. The streets of San Francisco, the Sacramento River, and the icy wastes of the Klondike in northern Canada are drained to tell the true story of 19th-century gold mania.

'S2/E2 - Full Throttle Traffickers'. The Dutch Caribbean Coast Guard intercepts drug smugglers at full throttle.

'S14/E10 - Carnage In Sao Paulo'. Seconds after taking off, TAM Airlines Flight 402 slammed into a residential neighbourhood bursting into flames, killing all 95 people on board.

'S2/E4 - Secrets Of The Civil War'. The land battles of the American Civil War are well known, but it's the war on the seas that shaped the outcome of the war. Maritime archaeologists and historians go in search of Civil War secrets.

'S1/E1 - Cities In The Sky'. Albert Lin explores Peru in search of the Lost City of the Cloud Warriors.

'S2/E1 - Segways and Water Skis'. What do Segways, water balloons and yo-yos have in common? They all pack a powerful punch! Watch as Segway riders ignore the laws of physics and water skiing goes wrong.

'S2/E2 - High Jumps and Shallow Water'. Some people can dive into the sea from giant cliffs and emerge unscathed, while others end up bloody after diving from the bank of a river.

'S1/E5 - Fight's On!'. Defensive dogfighting proves a tough test, as instructors go for the kill.

'S1/E1 - The Hitchhiker'. DNA detectives attempt to identify a victim of serial killer Larry Eyler.

'World's Greatest Train Journeys From Above. S1/E3 - Copper Canyon Railway'. The luxury El Chepe train is a wonder of Mexican engineering that took 100 years to build through the world's largest canyon region: Copper Canyon.

'Life Below Zero: Port Protection Alaska. S6/E2 - Everything Eats Each Other'. When a massive sunken tree blocks the local waterway, Matt Carlson uses his boat and a rope to try to haul the stump to safety.

'S1/E1 - On Patrol 24/7'. The team gets busy with an alleged case of domestic violence, and an attempt to smuggle drugs into the country raises alarm bells at headquarters.

'S18/E1 - Deadly Descent'. En route from Indonesia to Hong Kong, Cathay Pacific Flight 780 is high over the South China Sea when both of the plane's engines fail, turning the Airbus A-330 into a 200-ton glider.

'S2/E6 - Super-Sized Collapse'. Fails include a supermarket collapse, amusement parks ablaze and a tunnel rescue in India.

'S1/E8 - Heat'. This episode tells firsthand stories of an East Coast fishing community facing the end of an industry and an epic heat wave in Montreal.

'Unmasking the Killers of the Third Reich'. Previously unpublished photos unearth the origins of Nazi officials.

'S5/E8 - Scam City'. Mariana heads to Southeast Asia's ground zero for 'pig butchering' scams.

'S2/E4 - Escape From Supermax'. A nationwide FBI hunt ensues when armed robber Roy Harper and murderer John Woolard escape from the notorious Mississippi State Penitentiary.

'S1/E1 - Assassination'. The story of JFK's assassination through the eyes of the secret service agents whose mission was to protect him.

'S2/E6 - Super-Sized Collapse'. Fails include a supermarket collapse, amusement parks ablaze and a tunnel rescue in India.