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Guns: Follow Mariana as she infiltrates gunrunners tracing US guns to Mexican cartels, until a cartel revolt turns deadly. (S2, ep 1) 18+

Steroids: Investigate a booming black market as Mariana exposes the illegal steroid trade driven by social media, insecurity and greed. (S2, ep 2) 18+

Land Rover Defender: Follow Tim and Fuzz to Northern Ireland as they fight rust and time to save a Land Rover Defender with a heroic rescue past. (S14, ep 8) 7+

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

Guiness: Explore how Guinness's Dublin factory prepares for the busiest months in Irish beer. 7+

Boeing 747: After the bigger Airbus A380 stole its crown, Boeing is desperate to get a new plane in the sky, but the upgrade is already two years overdue. 7+

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Teleshopping.

Teleshopping.

Teleshopping.

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Firebomber Down: A C-130 firebomber crashes while battling an epic Australian wildfire. And ATSB investigators must determine the cause within an active fire zone. (S24, 3 of 10) 7+

Powerless Plunge: Just moments after takeoff, a Loganair cargo flight from Edinburgh loses both engines and crashes into the icy North Sea. (S24, 4 of 10) 7+

Beach Crash: Looks into the crash of Chalk's Ocean Airways Flight #101. Rocked by an explosion 500 feet up, the aircraft plunged into the ocean leaving no survivors. (S8, ep 8) 7+

Frozen Frontline: At Toronto Pearson International Airport, the sub-zero temperatures push the de-icing station to its limits, as snow and freezing ice delays take offs. (1 of 10) 7+

Seconds From Disaster: Fire crews race to a plane with faulty brakes, cargo vanishes and passengers refuse to check bags. (2 of 10) 7+

The Crash: A flight carrying 80 passengers and crew crashes on landing. As the airport goes into an immediate stop, the teams on the ground are pushed to their limit. (3 of 10) 7+

Mercedes SLK: Tim and Fuzz take on a Mercedes SLK with huge sentimental value for owner Lili, but this stylish roadster hides major mysteries. (2 of 10) 7+

Austin-Healey Frogeye Sprite: Tim and Fuzz face a mission: to rescue a Frogeye Sprite. Rusted and falling apart. Can they restore it with the help of Dame Joanna Lumley? (S14, ep 1) 7+

Motorsport Disasters: In motorsport, even minor miscalculations can lead to catastrophic crashes. Since 1950, Formula One has seen 52 drivers tragically lose their lives. (1 of 9)

Dead Weight: Just after takeoff, a plane plummets to the ground, killing all on board. Investigators find one of the causes to be out of date passenger weight calculations. 7+

Breakup Over Texas: Near the end of its one-hour flight, Continental Express Flight 2574 dropped from the sky, killing all on board. The cause? A simple maintenance error. 7+

Kathmandu Descent: Investigators scramble for answers when a vital piece of evidence fails to provide proof about a Pakistani airliner's crash in the Himalayas. (S19, ep 1) 7+

Hidden Flaws: Investigate shocking structural failures as experts uncover why skyscrapers, landmarks and cranes collapse when design and renovation go wrong. (S3, ep 4) 7+

System Breakdown: Explore aviation disasters caused by broken communication and see how hard lessons reshaped air traffic control forever. (S1, ep 11) 7+

Patrick Weninger: Step into a deadly game of trust as a CIA officer risks everything to protect a mole inside Al Qaeda during a high stakes fight for survival. (2 of 8) 7+

Explosive Touchdown: Experts fail to find a bomb when a Taiwanese plane explodes, but they uncover something shocking in the overhead lockers. (S19, ep 3) 7+