National Geographic Channel

'S1/E3 of 8 - Worst Case Scenario'. Cyril and his team of adventure filmmakers continue their dangerous quest to collect more salmon samples in the Northern Pacific.

'S2/E3 of 17 - Killer U-Boats'. Discover the story of the world's first stealth weapon, the U-Boat, and how it took on the might of the Royal Navy.

'S2/E5 of 11 - Coke, Cakes, And Cash'. HSI pursues a case of cocaine-filled cakes across state lines, and CBP seizes more than one hundred thousand dollars of undeclared currency.

'S19/E9 of 10 - Cockpit Killer'. When an African airliner mysteriously crashes, Namibian investigators rule out a host of possible causes before reaching a chilling conclusion.

'S1/E8 of 10 - Barber Surgeons, Astrologist-Physicians, Ancient Indian Medicine'. Bloodletting barbers and star-reading physicians are medicine's ancient roots.

'S1/E2 of 2 - WWII Survivors Speak'. Survivors reveal the final moments behind two WWII tragedies at sea.

'S2/E1 of 20 - Aquatics'. In this aquatic-themed episode, Dallas Campbell introduces clips of all things liquid as fearless individuals and animals demonstrate what not to do with water.

'S2/E2 of 20 - Celebrations'. Celebrations bring out the best in people - and the worst. In this episode, we have decided to celebrate the different ways in which humans have totally messed up.

'S2/E5 of 17 - 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.

'S9/E10 of 11 - Ford Cortina Mk3'. Tim and Fuzz head to Leicester to pick up a Mk3 Ford Cortina, once Britain's top-selling car - the car belongs to Bobby, whose family hope it will give him a pick-me-up.

'S1/E4 of 10 - Dinosaur Island'. Investigations into mass graves, rumours of mysterious flying objects, dinosaur remains, and strange ritual artifacts.

'S1/E4 of 8 - King Sized'. Cyril and his team must find their way out of the remote wilderness before severe weather destroys their salmon samples.

'S2/E7 of 11 - Party Drugs'. CBP looks out for party drugs, prostitutes and counterfeit goods entering Miami during Super Bowl, and HSI tracks the case of a drug-filled car battery.

'S19/E10 of 10 - Stormy Cockpit'. A brand-new 737 falls from the sky over west Africa during a major storm, but investigators eventually discover that weather had nothing to do with the fall.

'S1/E1 of 2 - Adventures To New Worlds'. 4000 years ago, daring voyagers sail to new islands in the vast Pacific ocean.

'S2/E4 of 8 - Plenty Below Zero'. The homesteaders work to survive and thrive in an unforgiving winter wilderness.

'S1/E8 of 10 - Spring Break Rush'. Spring break brings new pressures for the airport and its staff.

'S6/E4 of 6 - Hitler's Desert War'. Armed with one of the most famous generals of WWII, Erwin Rommel, Hitler takes on the Allies across Tunisia, Libya and Egypt - in a brutal campaign.

'S3/E8 of 10 - Moms On Trial'. Two mothers in the LA county women's unit are accused of murder and both refuse to confess. While awaiting trial, they contend with prisoners in an infamous women's ward.

'S1/E1 of 6 - Hurricane Dorian'. Category 5 monster hurricane 'Dorian' tears through the Caribbean and USA's Eastern seaboard, this is what our 1000 cameras captured.

'S1/E1 of 2 - Adventures To New Worlds'. 4000 years ago, daring voyagers sail to new islands in the vast Pacific ocean.