As debate over the US immigration system continues, Mariana heads to Mexico to investigate the billion-dollar business of people smuggling.

Hitmen murder nearly 3,000 people a year around the globe, yet little is known about them. What drives a person to make a living out of killing?

When a flight from Zurich crash-lands, killing everyone on board, the discovery of drugs among the wreckage suggests an alarming explanation.

Deadly Silence: En route to Dallas from Orlando, a private Learjet carrying pro golf legend Payne Stewart goes rogue. Air traffic controllers are unable to reach the crew.

11 September 2001 - shortly after taking off from Washington DC, hijackers storm the cockpit of American Airlines Flight 77 and fly the plane into the Pentagon.

En route from Bogota to the tiny Caribbean island of San Andres, Aires Flight 8250 is rocked by a major tropical storm but expected to emerge.

In this episode we learn the science behind attempting a snowmobile ridge jump, cycling over a pump track, and lighting fires.

We learn the science behind launching off snow ramps on inflatable tubes, driving through water on ATVs, and when animals tackle staircases.

In this episode, we learn the science behind the fails when mogul skiing, attempting to throw someone in the air, and running on floating logs.

In this episode, we learn the science behind attempting a doughnut spin on an ATV, riding river rapids, and working out with medicine balls.

Tim and Fuzz are off to Scotland to rescue a rare Talbot Sunbeam Lotus. The car was the pride of a former firefighter whose back injury stopped him from restoring it.

Tim and Fuzz travel Kent to pick up a very tired 1991 VW T4 Campervan. The vehicle's owner suffers with cancer and his wife hopes the boys can help bring a ray of light to his life.

Find out the story of three favourites: High Liner's ready-to-eat 'fillets', the nutty candy bar Peanut Chews, and New England's Moxie soda.

Find out the story of three favourites: Herr's kettle cooked potato chips, Dum-Dums Original Pops, and Joy Cones ice cream cones.

Draining Hawaiʻi reveals Japan's secret weapons, from mini-subs to fighter planes, with the wreck of USS Arizona a reminder of the forces unleashed.

Examining hidden giants can explain New York City's meteoric rise to bustling world metropolis. A city that can't be kept down, forever pushing forward, with true grit and determination.

Time is short and the police pile on the pressure when Thord struggles to get a 16-wheeler back on the road.

When a truck crashes into a cliff face, Bjoern has to join forces with a rival company at the rescue.

During the long winter nights, there's no time to sleep for the ice road heroes. Jo Roger's called out of bed to rescue a truck buried in snow.

The tow truck heroes get a new enemy: the extreme weather. Sudden changes in temperature give the Ice Road rescuers unforeseen challenges.

When a truck driver slides to a standstill on ice, but refuses help from Thord, he creates chaos on the main road.

These jobs are so big, Thord, Bjoern and rookie Terje call on each other for extra equipment and expertise as they clear dangerous Norwegian roads.

With flaws buried in their navigation systems, three planes suffer catastrophic computer errors that force investigators to dig deep for clues.

After a routine landing, a Taiwanese commuter plane is rocked by a massive explosion, but investigators find no evidence of a bomb on board.

When a fully laden truck and trailer gets buried in a ditch, Bjoern calls Thord for help. But it's not easy for the two bosses to work together.

Thord tries to tow out a car that crashed into a field after a snowstorm, but gets stressed when a winch failure threatens the rescue.

In the dead of night, Thord and Erlend get spooked, trying to rescue a van that crashed beside a graveyard.

Thord's skills are put to the test when the tricky rescue of an excavator forces him to find extraordinary solutions.

When a truck driver slides to a standstill on ice, but refuses help from Thord, he creates chaos on the main road.

When Thord and Bjoern rescue a truck that threatens to tip, Thord crawls beneath the trailer during the pull, putting his life in Bjoern's hands.

Thord and Bjoern face the ultimate rescue challenge when a truck is destroyed after crashing 40 metres down a mountainside.

Loading for Bear. When one of the town's only phone lines to the outside world goes down, village newcomer Veronica Arrants steps up to prove she's got what it takes.

Uphill Battle. Residents of Port Protection join forces to move a thousand-pound sawmill to Carl and Morgan's property.

Deadwood. Veronica tries to fell a tree. Sam and Squibb set nets for sockeye. Oliver builds a rainwater catchment system. Carl and Morgan install a garden.

Mariana investigates a new blackmail scam called ""sextortion"", in which compromising photos are used to extort victims and often leads to suicide.

In this episode, we learn the science behind the fails when mogul skiing, attempting to throw someone in the air, and running on floating logs.

Jo Roger and Ole Henrik struggle to rescue a trailer load of salt that threatens to pollute Norway's biggest salmon river.

A Martinair flight crashes in Portugal amid thunderstorms and heavy rain, and when investigators piece together the evidence the mystery only deepens.