This is the story of the greatest fortification project of the 20th century, Hitler’s ambitious Atlantic Wall, and the ultimate test it faced on D-Day.

This episode relates the development of the first ever space missiles used by the Nazis as destructive wonder-weapons to bomb the Allies into resignation and the rocket engineer who set the groundwork for the moon landing.

This episode describes the immense and impenetrable concrete and steel submarine pens that the Nazis built to protect their precious and deadly U-boats from Allied attacks.

The story of Nazi engineers tasked with fulfilling Hitler's megalomaniac demand for the construction of a land battleship weighing 1,000 tons.

Explore the story behind one of the most advanced aeroplanes of WWII, the Messerschmitt Me 262, and the subterranean bat-cave where it was built.

April 1945. Safe in his heavily fortified Führerbunker in the center of Berlin, Hitler prepares for the Allies' final attack.

A secret headquarters of concrete and steel is the heart of Hitler’s plans for domination and the key to a Nazi conspiracy - the Wolf’s Lair.

The Bismarck and Tirpitz were battleships of record breaking proportions, ultimate status symbols of the Third Reich and hunted by the Allies.

In a quest for world domination, the Nazis built some of the biggest, deadliest pieces of military hardware and malevolent technology in history.

In retaliation for Allied bombing raids, Hitler ordered the development of the V1. The first cruise missile, it changed the face of war forever.

As America closes in on Japan in 1944, the Japanese turn to desperate new tactics: killer planes and super torpedoes guided by human pilots.

The campaign to breach Hitler's 400 mile-long Siegfried Line took more than six months and cost the American forces 140,000 casualties.

Hitler transformed his Alpine retreat in Bavaria into a fortified fiefdom, home to 2,000 SS troops and protected by a high level security system.

It’s June 1940 and the Nazis have taken the Channel Islands, where Hitler orders some of the most fortified structures in the Third Reich.

Ruins across Europe tell the story of Blitzkrieg, a revolution in warfare which almost gave Hitler the chance to create his Thousand Year Reich.

Hitler planned a submarine to outperform all others. The Type 21 was the world's most advanced submarine: Hitler's sea-faring super weapon.

In the 1930s the Japanese begin designing the Yamato, the world's most powerful battleship, 30 per cent larger than anything their enemies have.

In 1945 Japanese generals construct a network of defences and tunnels on Okinawa, creating a devastating killing ground for American troops.

The Nazi empire ran on trains, from the personal trains of the leadership to the locomotives and service depots that serviced the network.

Railways were key to the planning and implementation of the Final Solution, used to bring victims to the death camps from all over Europe.

The fortifications the Nazis built in northern Italy were meant to slow the Allied advance. Now the team reconstructs their extent and depth.

After invading Norway in the spring of 1940, Nazi armed forces proceeded to fortify the entire country for war against Britain and the Soviet Union.

The war was lost long before it ended, but the Nazi propaganda apparatus was designed to keep that truth from its subjects for as long as possible.

The German air force was the most powerful and largest in Europe at the beginning of World War II, and it played a key part in Hitler's conquests.

From a bold idea through months of preparation, training, innovations and clever ruses, this is the story of Japan’s surprise WWII attack on Hawaii.