TV Guide National Geographic Channel Monday

A Boeing 737 crashes just moments after lifting off from an Algerian desert airport. For investigators, it's clear the left engine exploded after liftoff, and that a fatigue crack eventually explains why. What's less obvious is why an experienced crew of the state-owned national carrier was unable to keep their plane in the sky

How Emperor Commodus stunned Rome by fighting personally in the Colosseum. As he slays beasts and opponents, his obsession with fame spirals into megalomania. But behind the roar of the crowd, conspirators closed in, and the man who crowned himself Hercules faced a fate worse than anything in the arena

The world's largest 3D printer prints a full vehicle. A tunnel boring machine builds an underground highway. Engineers design a machine that creates single-piece metal parts

Fuzz Townshend and Tim Shaw travel to Oxfordshire to collect a 1973 Porsche 911 Targa. The run-down car belongs to Ben, who's had the motor for around 35 years. However, due to life getting in the way, and developing early onset dementia, he has been unable to get the car running. Wife Jeannetta and friend Andy hope that Car S.O.S can breathe new life into this old classic

The Concorde tragedy in 2000, when the supersonic aircraft burst into flames 60 seconds after taking off from Paris's Charles de Gaulle airport, claiming the lives of 109 passengers and crew and killing four people in a hotel on the ground. The crash was caused by a metal strip that fell from an earlier flight, and led in part to the withdrawal of the aircraft from service

The urban treasure hunters trawl through estate sales and auction houses in search of valuable silverware. But will they be able to uncover some profitable pieces and get a good deal?