Sworn to Secrecy: Secrets of War Season 9 Episode release dates & where to watch

1. Prisoners of War (1)

Examines the treatment of prisoners of war early in the 20th century. From capture to interrogation and internment, the fate of thousands of WWI prisoners was determined by their captors off the battlefield.

2. Prisoners of War (2)

Examines the treatment of prisoners of war on both sides during WWII. From interrogation to housing to repatriation, civilian and military POWs were often used as pawns between warring nations.

3. Prisoners of War (3)

From brainwashing in Korea to courageous acts of heroism in Vietnam and the Gulf War, a unique examination of POWs, their families, and their secrets.

4. The Balkans Tinderbox

A look at the secret forces behind the strife throughout the Balkan States. From a single gunshot in Sarajevo that started WWI to the Nazi occupation in WWII, to "ethnic cleansing" and the war in Kosovo, this volatile region has long been a threat to the peace of Europe.

5. WWI: Germany's Secret Gambles

As the armies of World War One struggled under an onslaught of terrifying weapons, the German government broke the stalemate and issued in a new era of warfare by turning to covert operations.