Nat Geo+1

7+.

When a truck driver refuses help after sliding to a standstill, he creates chaos on the main road. Plus, a gritter falls victim to the ice. (S9, ep 6) 7+.

Thord and Bjoern rescue a truck that threatens to tip, while Jo Roger looks to save a snow plough - before a second truck crashes in the same spot. (S9, ep 8) 7+.

As Thord and Terje risk their lives to save one truck's valuable cargo, Jo Roger and Stig help another truck which is stuck blocking a main road. 7+.

The planet is warming more rapidly in the north, heating up the mass of arctic air called the polar vortex. (4 of 10) 7+.

Gripping investigation into the fierce storm and deadly ambition that led to the deaths of nine climbers during their descent of Mount Everest in 1996. 7+.

Landing at one of the world's most challenging airports, a passenger plane comes in like a fighter jet, skids off the runway and bursts into flames. 7+.

Lightning has struck an incoming flight. As engineers assess the damage, high winds lead to runway closures and another plane starts leaking a potentially dangerous liquid. 7+.

A duty manager encounters a suspicious package, a rookie handles two medical emergencies in one hour and a freight handling crew struggle with a bulging cargo pod. 7+.

As thunder rumbles and rain pours, maintenance teams carry out urgent post-winter repairs, but lightning forces them inside. (7 of 10) 7+.

Flying 3,000 feet above the Gulf of Mexico, TACA flight 110 hit a violent thunderstorm. With both engines dead, it was up to the pilot to save everyone. 7+.

Straight after takeoff, Air Florida flight 90 stalled and plunged into Washington's Potomac River. Experts examine what caused the catastrophe. 7+.

Archaeologists excavate a buried city in Jordan, dive to a sunken temple in Italy and explore Petra to shed new light on how Rome conquered the east. (S2, ep 3) 7+.

Experts face a real puzzle after archaeologists discover a tomb containing a princess, a noblewoman and 30 mysterious mummies. 7+.

The discovery of Tutankhamun's tomb is revealed for the first time in colour, thanks to colorisation of black-and-white newsreel and photographs. 7+.

Deep beneath the ocean lie the remains of ancient wrecks. As the water drains away, discover the stories behind epic naval battles. 7+.