Sea of Madness
The survivors of "The Bogman" and five new acquaintances find themselves stranded on a WW2 military vessel in the middle of the ocean. A secret organization has discovered a strange new bacterium on the ocean floor and a freak storm causes this "black goo" to escape while the crew seems to be transforming into evil, grotesque, mermaids. Can Dr. Benjamin Martin and Deputy Thomas be lucky enough to survive yet another creature from the BCU (Bog Creature Universe)?
Below are the streaming services currently carrying the movie “Sea of Madness” in the United Kingdom, along with how each offers it (subscription, buy, or rent) and a direct link. Licensing differs by market, so availability in the United Kingdom can differ from other countries.
Where to watch Sea of Madness in United Kingdom
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Availability can change as licenses rotate — confirm on the provider’s page before subscribing. Last checked: 22 Sept 2026.