Top Gear sets out on a high-altitude voyage from Kathmandu, capital of Nepal, to the Forbidden City of Lo Manthang, a secretive kingdom perched high on the Tibetan plateau, on the far side of the Himalayas. It is a five-day expedition through the highest mountains, deepest gorges and harshest terrain on the planet. On their journey, the Top Gear presenters battle river crossings, mudslides and dizzying mountain passes on a trip that would test even the hardiest new 4x4s on the planet to the limit. But Paddy, Freddie and Chris aren’t crossing the Himalayas in new 4x4s. They are crossing the Himalayas in a very small old Peugeot, a very small old Renault and Nepal’s first (and only) home-built car.

Freddie Flintoff, Chris Harris, Paddy McGuinness and former hosts, Jeremy Clarkson, Richard Hammond, James May, Matt LeBlanc and Rory Reid, join well-known figures from the world of motoring to share their fondest memories of their colleague Sabine, Queen of the Nurburgring