The Katyn massacre, carried out by the Soviet NKVD in 1940, was only one of many unspeakable crimes committed by Stalin's ruthless executioners over three decades. The mass murder of thousands of Polish officers was part of a relentless purge, the secrets and details of which have only recently been partially revealed.

A six-part French documentary about the Second World War composed exclusively of actual footage of the war as filmed by war correspondents, soldiers, resistance fighters and private citizens. The series is shown in color, with the black and white footage being fully colorized, save for some original color footage. The only exception to the treatment are most Holocaust scenes, which are presented in the original black and white.

World War II In HD Colour is a 13-episode television documentary miniseries recounting the events of World War II narrated by Robert Powell. The show covers the Western Front, Eastern Front, and the Pacific War. It is on syndication in America on the Military Channel. This series is in full color, combining both original and colorized footage.

A series that discusses secrets and mysteries during wars in the 20th century.

In this BBC documentary series newly declassified documents are used to examine the strategic roles played in the war by thirteen of the world's regular and resistance land, sea and air forces.

The stories of the battles that brought together a Polish cavalry officer, a Canadian captain, and a Polish underground member are told by the very same Canadians who survived them.