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A routine check has shocking consequences, headquarters investigate a suspicious speedboat and coastguard teams handle a case of alleged domestic violence. 7+.

A design fault leads to an explosion on a DC-10. Two years later and the same fault causes a similar tragedy. It could've been prevented so why wasn't it? 7+.

Nero is Rome's most famous villain - but what is the truth behind the myths? Archaeologists reveal the new discovery of Nero's private theatre. (S2, ep 6) 7+.

Heroes of the Deep: In this special episode, submarine crews band together to overcome extraordinary obstacles. (S3, ep 2) 7+.

A closer look at the secret preparation and torpedo technology that was behind Japan's devastating surprise air attack on America's Pacific Fleet in 1941. (S5, ep 1) 7+.

On 20 January 1992, Air Inter flight 148 began its descent into Strasbourg. Amid bad weather it hit a mountain, prompting a search for survivors. (S8, ep 7) 7+.

Seconds after touching down in LA, a US Air Flight erupted in flames. Then, rescue workers made a horrific discovery. What went wrong? (S8, ep 4) 7+.

As they march through Western Europe, Nazi architects design Nazi cities of the future. But behind epic designs lie violent ideologies of oppression. (S1, ep 8) 7+.

From a buried film set to a WWI Navy ship and old fishing barge, discover the role these ruins played in Hollywood movie-making history. (S4, ep 3) 7+.

On the Hardangervidda, Thord and Bjoern team up to save a truck and trailer that crashed hard into the ditch. (S10, 3 of 8) 7+.

An Italian supermarket under construction drastically collapses. Amusement parks become a lot less amusing when fires break out. (S2, ep 6) 7+.

After taking off from Taiwan, a China Airlines 747 suddenly disappeared from radar and crash-landed, killing 225 people. Researchers try to find out why. 7+.

In 1943, Hitler is desperately trying to change the course of the war, while the Allies prepare to rid the world of the lead Nazi once and for all. (1 of.

It's 1944, and as the Allied forces take over the West and Nazis retreat in the East, Hitler orders his country to its ruin from his underground bunker. (2 of.

From gun batteries lining the Axis coasts to tall boy bunker busting bombs, these weapons were some of the heaviest hitters of World War II. (S3, ep 2) 7+.