Nat Geo HD

Three catastrophic approaches provoke questions, from a turboprop disaster to an invisible culprit on the Cuban border. (S6, ep 6) 7+.

From delusional hijackers to suicidal pilots, three flights fall victim to astonishing acts of sabotage. (S5, ep 10) 7+.

Meet the world's largest 3D printer, a huge tunnel-boring machine and engineers working on a machine that can create single-piece metal parts. (S1, ep 6) 7+.

Tim and Fuzz take on a MINI Mayfair bought by Donna with her late father's inheritance. Dreaming of a Cooper, she ended up with a rust-ridden wreck. (S14, ep 5) 7+.

A look at the war strategy and catalogue of errors that led to the British sinking of the Bismarck, a wreck that killed more than 2,000 German soldiers in 1941. 7+.

An accident or an act of murder? Investigators call in the FBI when Romania suffers the deadliest air disaster in its history. (S18, ep 6) 7+.

Hitler orders the largest battleships ever seen. But how long will they last? He also demands fortified bunkers in a bid to protect his U-boats from the Allies. 7+.

After the Twin Towers fell, doubts grew - but bold new safety breakthroughs sparked a surge, as taller, stronger skyscrapers rose worldwide.

Antoni Porowski explores Mexico City's flavours, culture and colour, from fine dining to lucha libre, uncovering what makes this city unmissable.

Drowned shipwrecks and lost battlefields reveal secrets of America's most famous siege and tell how Texas, against all odds, secured its independence. 7+.

US paratroopers are dropped behind enemy lines before the D-Day landings to prevent German reinforcements from reaching the beaches. (S2, ep 1) 7+.

Experts discover a missing pilot's unwitting part in a fatal crash as they investigate the collision between United Express 5925 and a private plane. 7+.

Amsterdam erupts as 800 ships arrive and crowds surge. With 150,000 extra passengers, staff battle to control the chaos, tackle incidents and keep the station safe.

Authorities suspect a terror attack when a plane explodes after taking off from JFK. The FBI joins investigators in their search for answers. (S16, ep 4) 7+.

At JFK Airport, Homeland Security and CBP officers intercept stolen antiquities and fake visas, working on the front line to stop smuggling and fraud. (S4, ep 3) 7+.

Slamming into a mountain, Japan Airlines 123 becomes the deadliest single aircraft accident in history and threatens to ground 747s worldwide. (S22, ep 3) 7+.