1944 - while the Nazis race to bolster their coastal defences, the Allies prepare for the largest amphibious invasion in history.

1942 - the Nazis develop the world's first cruise and ballistic missiles. Can the Allies stop Hitler before he rains down terror from above?

Stalin, seeking revenge, wages a war of annihilation against Nazi Germany. Over one million Soviet soldiers charge west to launch an attack on Berlin.

1943 - Allied commanders assemble the creme de la creme of their air forces to attempt one of the most audacious bombing missions of WWII.

December 1944 - Hitler launches an all-out assault on the Western front across Belgium and Luxembourg: The Battle of the Bulge.

1940 - 400,000 Allied troops are surrounded by Hitler's army at Dunkirk. Can the Allies escape and make it back to Britain to continue the fight?

Summer 1940: Fierce dogfights fill the skies over Southern England, as the pilots of the RAF defend the island from ferocious German bombers.

This new series explores World War Two's secrets, flying above D-Day and Dunkirk battle sites, hidden Nazi bunkers, lost battleships, and sunken shipwrecks.

This new series explores World War Two's secrets, flying above D-Day and Dunkirk battle sites, hidden Nazi bunkers, lost battleships, and sunken shipwrecks.