National Geographic Nazi Underworld: Hitler's Architect (2012)

Historian Chris Skidmore explores shocking evidence suggesting that Elizabeth I's dangerous secret love life led to cold-blooded murder.

Their bravery has inspired countless films but, until now, the real story of some of Britain's greatest war heroes has remained in the shadows.

Hitler's American Battleground takes us to the forgotten World War II waters off America's coast as the truth is revealed about the Nazi submarine tactics. The two-hour special follows experts as they chart WWII underwater battlegrounds

It has been hailed as one of the last great mysteries of World War II. It was supposed to be undetectable for British and American radars. Small aircraft with 1000 kilograms of bombs flying 1000 km per hour. Hitler's last chance. Did the Germans fly the first stealth fighter in 1944? In the final months of World War II a jet-powered flying wing made its first flight from a remote airfield deep inside Nazi Germany. Generations ahead of its time, the Horten 229 was designed to be a lethal fighter-bomber and more importantly, virtually undetectable to allied radar. Had Reimar and Walter Horten designed the world's first stealth fighter?

After battling in late 1939 with British cruisers off the coast of Uruguay, Hitler's prized "pocket battleship" and high-tech wonder, the Admiral Graf Spee was blown up by its own captain, Hans Langsdorff. Denounced by the Nazi regime, Langsdorff commits suicide shortly thereafter.

Punk music legend and snake enthusiast Henry Rollins is on the trail of slithering species in Snake Underworld.

Henry Rollins explores why some people choose to come face to face with some of the world's most dangerous and disturbing animals.

Ever had your pocket picked? Been ripped off by a taxi driver? Well, every year, hundreds of millions of tourists have their holidays ruined by conmen and scammers and often in the most glamorous cities on earth. Now Conor Woodman enters the underworld of petty crime and gets scammed…so you don’t have to.