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September 1939. The life of German U-Boat Commander Fritz Julius Lemp takes a series of dramatic turns as he risks the wrath of Adolf Hitler. (S3, ep 2) 7+.

From the wreckage of three airplane crashes, survivors emerge to tell harrowing tales and provide critical data about what to do in an emergency. 7+.

The Thames' water is drained revealing new evidence of how the British capital came to be one of the most powerful cities on Earth. 7+.

Archaeologists investigate the rise of Egypt's first pharaohs and how they transformed scattered communities into a powerful kingdom. (10 of 10) 7+.

From bridges to highways, skyscrapers to supermarkets, these are just some of the structures showcased in Construction Fails. (S2, ep 2) 7+.

Plans to restore a loved 1963 Alfa Romeo Guilia Spider grind to a halt when its owner is hit by a crippling medical condition. Can the boys work their motoring magic? (S3, ep 6) 7+.

On 20 August 2007, China Airlines Flight 120 catches fire and explodes shortly after landing and taxiing to the gate area at Naha Airport in Okinawa, Japan. 7+.

Eager to keep hold of the Channel Islands, Hitler ordered that some of the Third Reich's most fortified structures be built on British soil. (S3, ep 1) 7+.

Brace for disaster as dams fail, buildings collapse and engineers race to stop towering structures from falling apart. (S3, ep 3) 7+.

Tim and Fuzz head to Scotland to sneak away one of the 60s' great Italian classics. But owner Bill hasn't let the car out of his sight for almost 30 years.

Root for a comeback as Tim and Fuzz race to save a rusted Alfa Romeo and restore a dream stolen by heartbreak and time. (S14, ep 7) 7+.

On 6 June 1971, Hughes Airwest Flight 706 collided with a US Marine Corps F-4 Phantom at 15,000 feet over California. What was the cause of this fatal disaster? 7+.

Lawyer-turned-archaeologist Kathleen Martinez has spent 20 years searching for Cleopatra's lost tomb. Her excavations now lead in an unexpected new direction.

As the Mongolian landscape comes under threat, the need to find Genghis Khan's body becomes urgent. Experts set out to trace it, making a hugely important discovery. 7+.

Thanks to the discovery of an unknown film, see the reasons behind the flaming crash of the Zeppelin Hindenburg in black and white. 7+.