TV Guide National Geographic Channel Tuesday

Documentary following the work of emergency services in the northern Canadian wilderness, including firefighters, search and rescue teams, and animal control. Frigid temperatures wreak havoc on Dawson City, putting the fire department in danger. An avalanche shuts down the Klondike Highway

Presenter Tim Shaw and master mechanic Fuzz Townshend head to Warwickshire to spruce up a 1970 Lotus Elan, whose ex-racing driver owner has a painful spinal injury that has prevented him from maintaining the vehicle

The programme focuses on the tragic events of September 1961, when a Douglas DC-6 operated by Transair Sweden, carrying Dag Hammarskjöld, the second Secretary-General of the United Nations, crashed en route to cease-fire negotiations in Northern Rhodesia during the Congo Crisis. All 16 passengers and crew members were killed.

Documenting the extraordinary defences and kill zones that surrounded Hitler's bunker in Berlin, which was a subterranean safehouse protected with 13ft-thick walls to keep the fuhrer safe from any attack the allies could throw at him from the air

In Norfolk, Tim Shaw and Fuzz Townshend pick up Andrew's 1971 Triumph GT6, a classic British two-seater sports car. This sleek coupé, with its powerful straight-six, two-litre engine, was Triumph's answer to its rival's MGB GT, and is now a desirable classic. However, with petrol-head Andrew struggling with the effects of Marfan syndrome, restoring his own vehicle is now impossible so Tim and Fuzz step in to save the day

Spotlighting the process of making Mexi-Fries from potatoes, chocolate almond toffees connected to a comedy sketch, and a California distillery that makes absinthe