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TV series

Secret Nazi Bases

Latest episode

S4 E6 · Wolves in Wolves' Clothing

About Secret Nazi Bases

Secret Nazi Bases is a documentary TV series that premiered on Science on September 5, 2019. It has 4 seasons and 26 episodes so far and is still airing new episodes. The latest episode, Season 4 Episode 6 "Wolves in Wolves' Clothing", aired on July 16, 2025.

From tunnels to towers, artillery sites, resistance nests and communication centers, Nazi Germany left their footprint throughout the world. To this day, silent remains still exist, sentinels guarding clues about plots that Hitler was unable to carry out. The collapse of the Third Reich left as many secrets as it did relics. Still today, remnants of the Nazi's schemes lie concealed in structures scattered across the globe. Skeletons of projects give way to mysteries. Conspiracies abound about science fiction scenarios. The Nazis were nothing if not methodical, and a deeper look reveals even darker plans. From tunnels to towers, artillery sites and communication centers; the remains of these schemes lie waiting to reveal truths about the Fuhrer's tactics and dreams in Secret Nazi Bases. What did Hitler have planned?

  • Documentary

Last updated

Episodes

26 episodes · 4 seasons

Season 1

2019 · 6 episodes · Last episode: 7 years ago

Secret Nazi Bases Season 1 release dates →
  1. Secret Nazi Bases S1 E6 still E6

    6. Hitler's Invisible City

    Finale

    As the Soviet Army pushes the Nazis out of Poland, they discover a massive city of over a thousand buildings covering ten square miles that was unknown to the Allies, and using the latest science, experts reveal how Hitler was able to keep this sinister place hidden for so long. D.A.G. Fabrik Bromberg was a secret German explosives factory hidden in the Bydgoszcz Forest, providing a third of the munitions for Eastern Front.

  2. Secret Nazi Bases S1 E5 still E5

    5. Mystery of the Nazi Nukes

    When a secret bunker and a vast network of tunnels are discovered after World War II, experts use cutting-edge tech to uncover if the high levels of radiation in the area could be connected to a classified Nazi nuclear program.

  3. Secret Nazi Bases S1 E4 still E4

    4. Hitler's Forbidden Island

    New discoveries on the Channel Island of Guernsey, strangely fortified by the Nazis, reveal the terrifying truth behind Hitler's secret plan to win World War II at all costs, and using the latest science and tech, experts investigate what really happened here.

  4. Secret Nazi Bases S1 E3 still E3

    3. The Devil's Lair

    When a top-secret Nazi base is discovered in France decades after the war ends, experts use cutting-edge tech to reveal the secrets of this compound; what they find could change everything we know about D-Day and the last stand of the Nazi regime.

  5. Secret Nazi Bases S1 E2 still E2

    2. The Doomsday Castle

    An abandoned eerie structure in France could have doomed the Allies in World War II, and new discoveries at this mysterious site reveal the truth behind top-secret Nazi plans to unleash apocalyptic destruction.

  6. Secret Nazi Bases S1 E1 still E1

    1. Conspiracy on Death Island

    A strange, abandoned mansion on a remote island is central to countless conspiracy theories, and new discoveries reveal if this eerie site was a secret Nazi base intended for a sinister mission.

Season 2

2021 · 8 episodes · Last episode: 5 years ago

Secret Nazi Bases Season 2 release dates →
  1. Secret Nazi Bases S2 E8 still E8

    8. Curse of Himmler's Castle

    Finale

    In 1933, Heinrich Himmler signed a 100-year lease for Wewelsburg castle in Büren, Germany. The space became a clandestine training space for the SS.

  2. Secret Nazi Bases S2 E7 still E7

    7. Secrets of Vogelsang Castle

    Built in 1934, Ordensburg Vogelsang, a virtual Nazi Castle was constructed with the intention of building the New German; elite future leaders of the Reich.

  3. Secret Nazi Bases S2 E6 still E6

    6. Mystery Beneath The Castle

    Secrets of Hitler's Castle: When the Nazis took Ksiaz Castle, it wasn't for the view. Secret staircases and lifts were built, while underneath, a vast network of tunnels was taking form. S2 Ep6

  4. Secret Nazi Bases S2 E5 still E5

    5. Secret Relics of Nazi Research

    Outside the town of Politz lie the ruins of what was once one of Germany's most important assets - a place that kept the German war machine moving.

  5. Secret Nazi Bases S2 E4 still E4

    4. Underground Superweapons

    Hidden in a remote mountainous forest is a structure nicknamed the Fly Trap or Hitler's Stonehenge. Researchers still have no definitive idea what it is.

  6. Secret Nazi Bases S2 E3 still E3

    3. Secrets of the Owl Mountains

    In Poland lies a forgotten Nazi complex which could have sheltered up to 27,244 people from Allied bombs, the purpose of which largely remains a mystery.

  7. Secret Nazi Bases S2 E2 still E2

    2. Secret Nazi City

    Germany's preparations for WW2 began years before 1939. Under various guises, Germany began work on what would become their most technologically advanced front.

  8. Secret Nazi Bases S2 E1 still E1

    1. Inside The Terror Factory

    Guided missiles, the Wasserfall, and the war-changing V2 were dreamed up and tested in Peenemunde, a German seaside city suddenly overtaken by Nazi elite.

Season 3

2023 · 6 episodes · Last episode: 3 years ago

Secret Nazi Bases Season 3 release dates →
  1. E6

    6. Last Stand

    Why did the Nazis fight tooth and nail to protect the city of Luban? Abandoned factories, hidden tunnels, and strange rumors provide clues to the mystery.

  2. E5

    5. Nazi Gold

    Where are the missing billions? Exploring the tunnels, lakes, and secret caches used by the Nazis to hide spoils of war.

  3. E4

    4. Underground Terror

    A vast network of Nazi bunkers buried in the Hague tells the story of the greatest battle of WWII that never was.

  4. E3

    3. Terror Out of Sight

    Scientists in Kamienna Gora work to keep the Luftwaffe flying but are they also building Hitler's next revenge weapon?

  5. E2

    2. Run Silent Deep

    A chilling discovery in the furthest reaches of Eastern Canada hints at the true depths of the Nazis' seafaring capabilities.

  6. E1

    1. Into the Wolf's Den

    Allied forces stumble across a sprawling complex in the French countryside. What did the Nazis have planned for this mysterious Nazi stronghold?

Season 4

2025 · 6 episodes · Last episode: 1 year ago

The collapse of the Third Reich left as many secrets as it did relics. Still today, remnants of the Nazi's schemes lie concealed in structures scattered across the globe. Skeletons of projects give way to mysteries. Conspiracies abound about science fiction scenarios. The Nazis were nothing if not methodical, and a deeper look reveals even darker plans. From tunnels to towers, artillery sites and communication centers; the remains of these schemes lie waiting to reveal truths about the Fuhrer's tactics and dreams in Secret Nazi Bases. What did Hitler have planned?

Secret Nazi Bases Season 4 release dates →
  1. Secret Nazi Bases S4 E6 still E6

    6. Wolves in Wolves' Clothing

    Deep in the forests of East Prussia, a sprawling Nazi complex becomes the nerve centre of Hitler's empire - and the site of a daring plot against the Fuhrer.

  2. Secret Nazi Bases S4 E5 still E5

    5. Island Battleship

    After the Allied landing in Normandy, France falls city after city - but a small island fortress off the coast becomes the stage for a harrowing act of Nazi defiance.

  3. Secret Nazi Bases S4 E4 still E4

    4. Vengeance Under the Dome

    As Allied bombing raids escalate, a massive concrete dome rises from the French countryside, reportedly concealing a crucial component of Hitler's plan.

  4. Secret Nazi Bases S4 E3 still E3

    3. A Secret to Win the War

    In 1942, a mysterious technology is facilitating a deadly Blitz. Desperate for answers, British intelligence sets its sights on an installation in Bruneval, France.

  5. Secret Nazi Bases S4 E2 still E2

    2. Darkened Turrets

    As Hitler's shadow engulfs Europe, ancient castles across the continent fall under Nazi control and are transformed to serve the ambitions of the Third Reich.

  6. Secret Nazi Bases S4 E1 still E1

    1. A Secret Canal

    With Nazi Germany's rise to power, a long-abandoned canal project in East Prussia is resurrected, but the true purpose of this massive waterway comes into question.

Cast & crew

  • Pedro Fumero

    Pedro Fumero

    Himself

Secret Nazi Bases FAQ

When is the next episode of Secret Nazi Bases?

A date for the next episode of Secret Nazi Bases hasn't been announced yet. Follow Secret Nazi Bases in the Streambay app and you'll be notified as soon as a new episode airs.

When did the latest episode of Secret Nazi Bases come out?

The most recent episode of Secret Nazi Bases, Season 4 Episode 6 "Wolves in Wolves' Clothing", aired on July 16, 2025.

How many seasons of Secret Nazi Bases are there?

Secret Nazi Bases has 4 seasons with 26 episodes in total.

When did Secret Nazi Bases first air?

Secret Nazi Bases first aired on Science on September 5, 2019.

How do I get notified when new episodes of Secret Nazi Bases are released?

Download the Streambay app, follow Secret Nazi Bases, and you'll get a push notification the moment each new episode is released.

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