National Geographic Channel

'S1/E2 - Traitors'. All Tower executions were horrific, but the worst were saved for those who betrayed the crown. Suzannah and Joe reveal how traitors met their end.

'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.

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

'S1/E3 - A Box of Bones'. After 38 years, can investigators identify a murder victim from Texas?

'S3/E1 - Hitler's Island Megafortress'. It's June 1940 and the Nazis have taken the Channel Islands, where Hitler orders some of the most fortified structures in the Third Reich.

'S3/E8 - Crystal Skull, Dragon Chair, Assyrian Star Map'. Is a crystal skull powered? Is a spiked chair torture? Is a tablet astronomical?

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

'S3/E10 - Vulture Stone, Isolator, Armored Skeleton'. Can a carving retell history? A helmet cure modernity? Who's the armor skeleton?

'S1/E32 - Cats'. Learn how many ways our cats can embarrass and injure themselves when jumping off slippery surfaces and balancing on fences.

'S1/E33 - Dogs'. In this canine special, discover how dogs embarrass themselves while catching a Frisbee, riding a skateboard and running on slippery surfaces.

'S4/E1'. In this episode we learn just how many ways there are to embarrass, injure and humiliate yourself while doing pogo backflips, Ski Cliff drop-ins or just reverse parking.

'S4/E2'. In this episode we learn how many ways there are to embarrass, injure and humiliate yourself while doing swimming pool handstands, jumping all terrain vehicles or going down slides on random objects.

'S4/E3'. In this episode we learn just how many ways there are to embarrass, injure and humiliate yourself while doing flips off a tire, monster truck jumps or just riding a child's scooter.

Niue, a small island nation with big plans to protect its ocean resources.

An elite climbing team attempts to deliver a renowned scientist to the top of a tepui.

'S1/E1 - Secrets of the Deadly T-Rex'. How did the T-Rex become king of the dinosaurs?

'S1/E2 - Secrets of the Terror Whale'. How prehistoric land mammals evolved into top ocean predators.

'S1/E3 - Secrets of the Giant Mammoths'. Why did the giant ice age mammoth became extinct?

'Primal Survivor: Extreme African Safari. S1/E1 - Desert Nomads'. Hazen takes on an extreme wildlife expedition in Africa's Great Rift Valley.

'Primal Survivor: Extreme African Safari. S1/E2 - Valley of Giants'. Hazen Audel descends sheer slopes into the Great Rift Valley in search of elephants.

'Primal Survivor: Extreme African Safari. S1/E3 - Deadly Waters'. Hazen Audel battles Lake Baringo's wild waters on an epic wildlife mission.

'S2/E1 - Rescued at Sea'. The Dutch Caribbean Coast Guard performs search and rescue operations.

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

'Ice Road Rescue: Highway Havoc! Compilations. S7/E1 - Technical Difficulties'. Thord, Jo and Terje must think fast when technical difficulties emerge.

'Ice Road Rescue: Highway Havoc! Compilations. S7/E2 - Hazardous Highways'. Jo, Thord and Bjoern rescue vehicles in extra-dangerous situations.

'Ice Road Rescue: Highway Havoc! Compilations. S7/E3 - No Risk, No Reward'. Rescue teams face and take huge risks to keep busy roads open.

'Ice Road Rescue: Highway Havoc! Compilations. S7/E4 - Total Chaos'. Difficult drivers and broken equipment cause chaos for Norway's rescuers.

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

'Gladiators: Warriors of the Ancient World. S1/E1 - Spartacus: Rise of the Gladiator'. Enslaved warrior Spartacus rises as a gladiator to lead a revolt against Rome.

'S1/E4 - The Pacific Islands'. Will travels to a remote South Pacific island threatened by rising seas.

'S1/E6 - The Kalahari Desert'. Will travels to the Kalahari Desert to learn the secrets of the San people.

'S3/E1 - Tutankhamun's Mask?, Terror Balloon, Witch Bottle'. Is King Tut's mask his? Was America balloon-bombed? Is a clay bottle magic?

'S3/E2 - Tukuturi, Avrocar, Mesmer Tub'. Why is one moai bearded? Are flying saucers real? Can a wooden bucket heal?

'S1/E3 - Scandal'. Suzannah and Joe examine how two of Henry VIII's wives lost their lives in the Tower following accusations of amorous affairs.