Expedition Unknown (2015 – ...)

2015 • 18 seasons • Documentary, Reality • TV-PG

On August 7, 2026

#1639

1639th most popular TV show online

45 Popularity Score

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Overview Watch Cast Seasons (18) Similar Videos Images

Episode 4 — The Nazi's Lost Super Sub

Name: Episode 4 — The Nazi's Lost Super Sub
Released: 2025-11-26
Duration: 43 min
Rating: 7
Cast: Josh Gates

Season 17 • Expedition Unknown

Released: 2025-11-26 • Documentary/Reality/Action & Adventure

70%

User score

Josh dives the frigid waters of the Baltic Sea in search of a revolutionary Nazi submarine: the V-80. Hitler ordered it scuttled to prevent the Allies from learning its secrets. Now, Josh risks it all to bring the prototype to the surface.

Episodes

Episode 1
Mysteries of the Great Pyramid
2025-11-05

Episode 2
Great Pyramid Secrets Revealed
2025-11-12

Episode 3
The Great Gold Rush Shootout
2025-11-19

Episode 4
The Nazi's Lost Super Sub
2025-11-26

Episode 5
The Real Goonies Treasure
2025-12-03

Episode 6
Vanderbilt's Lost Steamship
2025-12-10

Information

Episode air date	26.11.2025
Episode runtime	43 min
Episode rating	7.00
Genres	Documentary / Reality / Action & Adventure
TMDB series rating	8.0
IMDb series rating	8.2
Series status	Returning series
Age rating	6+
Country	US