You think you know the history because You’ve seen the black and white footage; you even know the names of the architects of atrocity.

But what if a hidden album, tucked away for nearly a century, holds the true, chilling portrait of how ordinary men became the engineers of extermination?

The Unseen: A Photo Album That Rewrites History

In the chaotic aftermath of World War II, a soldier picked up a seemingly innocuous souvenir from Hitler’s Bavarian Alps retreat: a photo album. For decades, it was just a relic. Tonight, on National Geographic, that album is cracked open, and what it reveals will freeze your blood.

This isn’t just a collection of faded snapshots. It’s an unprecedented look at the early, terrifying beginnings of the Nazi concentration camp system, through the eyes of the men who built it.

• Who were they before the killing started?
• What did their ‘normal’ lives look like between shifts of unimaginable cruelty?
• And how did a radicalized group of young Hitlerites, smiling for the camera, transition into the most efficient ‘killing machines’ the world has ever seen?

From Comrades to Killers

Dr. Stefan Hördler, a world-leading Nazi historian, has spent five years analyzing every face, every pose, every subtle detail within these 207 unseen photos. He is reconstructing the very path of radicalization and the terrifying story of how these men evolved from idealistic young comrades into the ruthless guards and administrators of the death camps.

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The photos show them laughing, dining, posing together in moments of apparent camaraderie. Look closely:

• What kind of shared secret unites the smiles of these officers?
• Where does the line blur between a casual weekend gathering and a deadly planning session?
• The biggest mystery: Do these new images challenge everything we thought we knew about the very origins of the concentration camp system?

Tonight, we don’t just examine the aftermath of evil; we witness its insidious creation. We don’t just look at ‘monsters’; we are forced to stare into the human faces that wore the uniform, and ask ourselves the eternal, unsettling question: How?

Don’t miss the groundbreaking investigation that forces a new look at the darkest chapter of the 20th century.

TUNE IN TONIGHT for National Geographic’s ‘ Unmasking The Killers of the Third Reich’.

National Geographic is available on Zuku, across all packages in all territories.