National Geographic Channel

'S6/E3'. This aerial tour of Great Britain uncovers Wales's biggest castle, a migration of Highland cattle and monster bridge-making machine.

'Life Below Zero: Port Protection Alaska. S5/E2 - Float-House Resurrection'. After a terrible tragedy, the residents of Port Protection, Alaska must rise from the ashes and rebuild their isolated community with the help of newcomers.

'S1/E2 - Nazi Secrets'. We think we know Hitler's plans to dominate the world, but there's an untold story of how the Nazis waged a secret war across the world's oceans.

'S1/E3 - SOS Rescue'. The coastguards intercept a boat full of refugees, and the Search and Rescue helicopter tries to help the crew of a sinking trimaran.

'S17/E7 - Free Fall'. En route from Singapore to Perth, Qantas Airways Flight 72 takes a sudden nosedive over the Indian Ocean, causing very violent and sudden G-forces.

'S1/E3 - Gulf Of Mexico'. With unrivalled quality and spectacular imagery, this channel brings you award-winning documentaries from around the world - from wildlife adventure and exploration to natural phenomena and world cultures.

'S1/E2 - El Dorado: City Of Gold'. National Geographic explorer and scientist Albert Lin travels to Colombia in South America to find out the truth behind the legends of El Dorado.

'S2/E5 - Kayaks And Dirt Bikes'. A standing jump may seem simple but turns into a nose dive, while planking and wheelchair wheelies cause serious damage when there is a shift in the centre of mass.

'S2/E6 - Surfing And Sand And Walking In Heels'. Revisit your childhood watching others climb trees and play leapfrog, amateur sand surfers try to overcome friction and avoid eating sand, and is there a perfect punch?

'S1/E1 - India'. A cinematic journey following David Blaine across the globe to chase little-known magic within our world and uncover the masters behind it.

'S1/E2 - Catching the Wire'. Aircraft carrier landing is the most technical test yet for the students.

'S6/E4'. The beauty of the Balkans revealed from a unique aerial perspective.

'Life Below Zero: Port Protection Alaska. S5/E3 - Locked and Loaded'. After a terrible tragedy, the residents of Port Protection, Alaska must rise from the ashes and rebuild their isolated community with the help of newcomers.

'S1/E4 - Drug Bust at Sea'. The Royal Navy orchestrates a spectacular drug bust, and the Coastguards spot suspicious people in the marina which triggers them to investigate.

'S17/E8 - Deadly Inclination'. On its final approach to Zurich, Alitalia Flight 404 ploughs into a forested hillside, killing everyone on board.

'To Catch a Smuggler: Contraband Capture. S1/E4'. With unrivalled quality and spectacular imagery, this channel brings you award-winning documentaries from around the world.

'S1/E7 - Lightning Alert'. Spring arrives, and Toronto airport faces new weather challenges.

'S3/E9 - Mechanical Turk, Lindbergh Pump, Etruscan Mummy'. A robot chess player, an immortality device and a lost language wrapped mummy?

'S4/E4 - Apes'. Mariana heads to the Congo to investigate the illegal trade in wild apes that has left them on the brink of extinction.

'S1/E6 - How To Fall In Love'. Throughout history, people have lost heads, wars, and their sanity for love - we find out how and why...

'S6/E1 - Jonestown Cult Suicide'. Revealing how US congressman Leo Ryan exposed the true horror behind Reverend Jim Jones' religious community deep in the Guyanese jungle.

'To Catch a Smuggler: Contraband Capture. S1/E4'. With unrivalled quality and spectacular imagery, this channel brings you award-winning documentaries from around the world.