TV series

Sea Monsters

Latest episode

S1 E3 · To Hell and Back

Tuesday, September 23, 2003

About Sea Monsters

Sea Monsters is a documentary TV series that premiered on BBC One on September 9, 2003. It has 1 season and 3 episodes so far and has ended. The latest episode, Season 1 Episode 3 "To Hell and Back", aired on September 23, 2003.

Zoologist Nigel Marvin travels back in time to visit deadly creatures of the prehistoric oceans.

Documentary

Last updated July 1, 2026

Episodes

3 episodes · 1 season

Miniseries

2003 · 3 episodes · Last episode: 23 years ago

Sea Monsters Miniseries release dates →

E3

3. To Hell and Back

Finale 23 years ago

After leaving the Pliocene, Nigel explores the second deadliest sea, the Jurassic (155 million years ago). There, he meets the giant filter-feeding fish Leedsichthys and predators such as the shark Hybodus and the marine crocodile Metriorhynchus. The apex predator of the Jurassic sea is the giant pliosaur Liopleurodon, which Nigel keeps away through spraying putrescine at them when they approach him. Nigel then travels to "Hell's aquarium", the Cretaceous (75 million years ago). The sheer number of different predators present, including sharks, giant predatory fish Xiphactinus and giant mosasaurs, makes the Cretaceous the deadliest sea of all time. In addition to predators, Nigel also encounters a variety of other Cretaceous animals, such as the aquatic bird Hesperornis, plesiosaur Elasmosaurus, pterosaur Pteranodon and giant sea turtle Archelon.
E2

2. Into the Jaws of Death

23 years ago

Leaving the Devonian, Nigel travels forward in time to the fourth deadliest sea, the Eocene (36 million years ago), where he encounters the strange elephant-related Arsinoitherium. Diving in the Tethys Sea, Nigel encounters the primitive whale Dorudon and the crew of The Ancient Mariner uses recorded whale sounds to attract the giant predatory primitive whale Basilosaurus. In the third deadliest sea, the Pliocene (4 million years ago), Nigel encounters the strange whale Odobenocetops and dives with a adolescent megalodon shark. He later uses the rounded shark cage to dive with an adult megalodon, the largest shark of all time.
E1

1. Dangerous Seas

23 years ago

Nigel travels back in time to the seventh deadliest sea of all time, the Ordovician period (450 million years ago), where he is attacked by sea scorpions and comes face-to-face with a giant orthocone. He then explores the sixth deadliest sea, the Triassic (230 million years ago), where he encounters a pair of Nothosaurus, the bizarre sea reptile Tanystropheus and the giant primitive predatory ichthyosaur Cymbospondylus, which Nigel keeps at bay through using a cattle prod. Nigel then dives in the fifth deadliest sea, the Devonian (360 million years ago). In the Devonian, Nigel encounters the strange primitive shark Stethacanthus and the placoderm Bothriolepis and he uses a rounded shark cage to protect himself from the giant predatory placoderm Dunkleosteus.

Cast & crew

Created by Tim Haines

Sea Monsters FAQ

Will there be new episodes of Sea Monsters?

Sea Monsters has ended, so no new episodes are scheduled. The final episode aired on September 23, 2003.

When did the latest episode of Sea Monsters come out?

The most recent episode of Sea Monsters, Season 1 Episode 3 "To Hell and Back", aired on September 23, 2003.

How many seasons of Sea Monsters are there?

Sea Monsters has 1 season with 3 episodes in total.

When did Sea Monsters first air?

Sea Monsters first aired on BBC One on September 9, 2003.

How do I get notified when new episodes of Sea Monsters are released?

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

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Show info

Status: Finished
First aired: September 9, 2003
Last aired: September 23, 2003
Seasons: 1
Episodes: 3
Network: BBC One
Created by: Tim Haines
Episode length: 29 min
Language: English
Country: GB

More new BBC One releases →

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