California Pipeline Catastrophe: What caused the explosion that devastated a Californian neighbourhood and killed many residents? (S1, ep 6)
Colorado Dam Disaster: A storm takes out nine dams in Colorado, leaving an entire area flooded and its population stranded. (S1, ep 5)
Kentucky Sinkhole: When a sinkhole swallows the National Corvette Museum in Kentucky, is there anything engineers can do to make it safe again? (S1, ep 4)
Freight Train Collision: What engineering failure could have caused a single train crossing to become the site of two deadly collisions within a single year? (S1, ep 3)
Heartland Explosion: A look at devastating events caused by engineering failures. What caused the colossal explosion in a small Texas town that tragically killed 15 people? (S1, ep 2)
Exploding Manhole Covers: A look at some of the world's most devastating disasters. This time, what caused manhole covers across the US to inexplicably explode? (S1, ep 1)
A special investigation into the mythologies, conspiracies and accusations that surround an abandoned military base known as Camp Hero in Montauk, Long Island.
Collision Course: Two trains crashed in the Rocky Mountains, but why were they on the same track? An inquiry reveals the shocking truth about those who run Canada's freight trains.
Head on Collision: Eighty people died when the Express Samina sank near the Greek island of Paros. How did it hit a rock that rose 25 metres out of the sea? Experts investigate.
Runaway Train: A freight train travelling through the calm suburb of San Bernardino derails and crashes, destroying homes and taking lives. Two weeks later, more carnage follows.