Nat Geo HD

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Take a bite out of Affy Tapples caramel apples as we uncover how they get through 20 tonnes of gooey caramel every day. U.

Take a bite out of an out-of-this-world snack for astronauts, watch as heaps of raw sugar become sugar cubes and use a Ferris wheel-style oven. U.

Seconds after take off, American Airlines Flight 191 crashed, killing everyone on board. Gripping investigation into the US's worst aviation disaster. RATING: AA.

Deep in enemy waters, USS Silversides battles depth charges and a jammed torpedo as it intercepts Japanese ships. (S2, ep 1). All Ages.

Officers arrest a man with cocaine-filled food packages. Meanwhile, an elderly woman is stopped with drugs embedded in her bag. (S6, ep 4) RATING: NU.

Presenter Tim Shaw and musician and mechanic Fuzz Townshend surprise a car fanatic by secretly fixing up his beloved 1938 MG TA. (S2, ep 2) RATING: AA.

Three Mile Island, Mont Blanc Tunnel, Sampoong Mall: How did a nuclear reactor at Three Mile Island melt down? And how did a small truck fire become a lethal inferno? 7+. (3 of.

What Happened?: In this special episode, examine one of the greatest aviation mysteries of all time - the disappearance of Malaysia Airlines Flight 370. U.

Lost Nukes of the Cold War: Experts head beneath the waves to reveal the shocking secrets and doomsday weapons of the Cold War - the world's first nuclear-armed confrontation. RATING: AA.

On the Isle of Wight, researchers have found the remains of an unknown species of dinosaur. This finding could change what is known about prehistoric life. 7+. (1 of.

Tim and Fuzz are off to Devon to steal away a '90s super saloon. But when the boys get back to the workshop, they realise they've got their work cut out. All ages.

Fuzz and Tim sneak more clapped-out classic cars from their owners and fix them up without them knowing. RATING: AA.

A mid-air explosion rocks Southwest Airlines 1380. While pilots struggle to regain control, flight attendants make a horrifying discovery. RATING: NU7.

The stigma surrounding UFOs extends beyond the US government. Pilots fear for their jobs after encountering mysterious phenomena in flight. 7+.

HSI discovers overcrowded stash houses used to hide human cargo, showcasing the darker side of smuggling operations. 7+. (8 of.

Newbie Domenic calls on Thord when a stubborn driver creates more danger on the main road. 7+.

Delta Airlines Flight 191 hit a storm. A strong gale slammed the plane to the ground, killing all on board. Can plane designers ever overcome microburst winds? 12+.