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The Underwater Realm poster
Official Collection
Series Freshness: Feb 04, 2026

The Underwater Realm

Thousands of years ago, the world's most advanced civilisation sank beneath the waves, its people forever doomed to wander the ocean floor. The Underwater Realm is the story of the five times those on the surface have caught a glimpse below: freediving off the coast of modern Hawaii, a downed pilot at the height of World War II, amidst the smoke and fire of the Spanish Armada, a suicidal girl in medieval England, and finally, at the height of Roman Power in 149 BC.

5Movies
★ 8.5 Avg Rating

Franchise Evolution & Timeline Analysis

The The Underwater Realm has evolved significantly over a span of 0 years, growing from a singular narrative into a complex cinematic universe. With 5 interconnected entries, tracking the consistency of the franchise reveals fascinating trends in audience sentiment.

The "Series" Benchmark: 6.9/10

The franchise maintains a steady average rating of 6.9. While most series experience "Sequel Fatigue," The Underwater Realm has managed to keep its narrative quality relatively stable, with The Underwater Realm - Part V - 149 BC standing out as the peak cinematic achievement.

Continuity vs. Commercial Appeal

Our data indicates that while the "Release Order" is preferred for first-time viewers, the "Chronological Order" provides a much deeper understanding of the world-building within the The Underwater Realm. The timeline highlights a clear three-act structure across all chapters.

Timeline & Watch Order

We recommend watching the The Underwater Realm franchise in the following order to fully experience the narrative expansion.

1
The Underwater Realm - Part V - 149 BC

The Underwater Realm - Part V - 149 BC

2012★ 8.5SUPER HIT

The height of Roman power. The greatest army the world has ever known – or, at least, that it remembers. Far down in the depths of the ocean, the remains of ano...

2
The Underwater Realm - Part I - 2012

The Underwater Realm - Part I - 2012

2012★ 7.0HIT

Azure skies, sun drenched waves and coral reefs bursting full of life. Diving in the Mediterranean seemed the perfect setting for a honeymoon. Swimming down int...

3
The Underwater Realm - Part II - 1942

The Underwater Realm - Part II - 1942

2012★ 7.0HIT

World War II. British Spitfires and German Messerschmitts swarm in a furious dogfight.. A Spitfire is hit. The plane plummets helplessly into the water, gliding...

4
The Underwater Realm - Part III - 1588

The Underwater Realm - Part III - 1588

2012★ 6.0ABOVE AVERAGE

The Spanish Armada. Galleons sway on roiling seas as far as the eye can see. In a smoky cabin, a young boy works to keep the cannons loaded. A chance explosion...

5
The Underwater Realm - Part IV - 1208

The Underwater Realm - Part IV - 1208

2012★ 6.0ABOVE AVERAGE

A medieval girl stands at the edge of a clifftop. Behind her, a gaunt castle, the Lord who has claimed her for his wife, and the cruel execution of her lover. B...

Common Questions about The Underwater Realm

How many movies are in the The Underwater Realm?

There are currently 5 movies in the The Underwater Realm, starting from The Underwater Realm - Part I - 2012 to the latest release, The Underwater Realm - Part V - 149 BC.

What is the best order to watch the The Underwater Realm?

The best way to watch the The Underwater Realm is usually in release order: starting with The Underwater Realm - Part I - 2012 and ending with The Underwater Realm - Part V - 149 BC. Check our timeline for the full chronological breakdown.

Which is the highest-rated movie in the The Underwater Realm?

According to movieMx ratings, the fans have a strong preference for The Underwater Realm - Part V - 149 BC in this franchise.