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Three disasters are forensically dissected, from Challenger's fatal launch to a cable car tragedy and an ice rink roof collapse. (S2, ep 5) 7+.

Experts investigate the collision of two planes over the Grand Canyon in 1956, uncovering a frightening problem that threatened the entire aviation system. 7+.

Witness a wonder of Mexican engineering as the luxury El Chepe train glides through the world's largest canyon region, Copper Canyon. 7+.

Tim and Fuzz are off to Kent to rescue a 1973 Dennis Fire Engine belonging to firefighter James, who recently lost his father to cancer. (S10, ep 7) 7+.

Stress levels rise when an emergency landing threatens to shut down one of the world's busiest airports. At customs, officers uncover a whopping 2.1kg of crystal meth. (S2, ep 4) 7+.

When an Amazon cargo plane nosedives into a swamp outside Houston, the investigation brings to light a pilot with a long history of failures. (S22, ep 9) 7+.

As the war reaches its endgame, the Western and Soviet Allies race to take Berlin, the heart of Nazi Germany. (S3, 5 of 6) 7+.

Hitler gathers 800,000 Nazi soldiers to launch a major attack against Stalin and aim to eliminate the Red Army. (S3, ep 6 of 6) 7+.

Explore a labyrinth of underground tombs and uncover a coffin in our search for Queen Nefertiti's final resting place. 7+.

Draining Lake Michigan uncovers Chicago's secret history and exposes a catastrophe that killed 300 people and reveals an engineering marvel. 7+.

During the Battle of Britain, the fate of a nation rested on the legendary Supermarine Spitfire as it stood between Nazi Germany and the invasion of southern England. (1 of 5) 7+.

Clues point to a mechanical problem when a Continental Airlines flight crashes. But then, investigators find the true culprit in the Rocky Mountains.

It's June 1941, and Hitler is busy invading the USSR. He's eager to conquer this 'living space'. (1 of 2) 7+.

In October 1941, Hitler thinks his victory over the USSR is imminent, but his madness leads to an apocalypse on the Eastern front. (2 of 2) 7+.

America's Deepest Loss: Research vessel Petrel picks up what they believe to be the debris trail of the USS Johnston, 8,000 feet deeper than the Titanic. (S1, ep 8) 7+.

On 6 August 1997, Korean Air Flight 801 crashed before landing, killing over 200 people, caused by a series of errors by the pilot and airline. (S4, ep 4) 7+.