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The six-episode French miniseries “Sea Shadows” (originally, “Rivages”) opens with a fishing boat and its 16-member crew vanishing in a sudden, violent storm that also contains several other inexplicable effects. They are from Fécamp, a close-knit village that depends heavily on its fishing industry, so the disappearance threatens the entire community. Abigail (Fleur Geffrier), an oceanographer whose experience may be relevant to this mysterious set of phenomena, is sent to investigate … reluctantly. Fécamp just happens to be her hometown, which she has assiduously avoided for three years, following some traumatic events the series gradually reveals to us. Her father owns the town’s largest fleet, including the missing boat, adding to the dramatic tension.

This plays out as a suspense thriller, taking quite a few episodes to sort out whether the phenomenon is man-made, extraterrestrial, or due to some other sic-fi threat. If man-made, is it some secret government program gone awry, or an attack by foreign foes? Strange subsurface lights and vibrations defy explanation. Once the military arrives on the scene, the cause(s) and remedies get even more muddled. Abi strives hard to do the right thing, despite struggles with that old business that kept her away, and the resistance she gets from locals and the army – especially the overzealous Commandante Calderi (Valerie Dashwood), whose agenda makes her extreme actions and attitude rival the worst of cinematic wingnuts in uniform.

The script contains a considerable amount of soapy stuff, mostly arising from her multiple family history issues. She has to navigate churning waters among the fishermen who are eager to resume plying their trade, politicians who don’t want their plans for a huge offshore windfarm derailed, and ecology groups that strongly oppose overfishing and environmental downsides of the proposed turbines. Those folks variably fit in as parts of the problem and parts of the solution. The principal mystery remains solid and suspenseful throughout, and most of the subplot diversions wind up having value by the time we reach the climax. The last episode gets a bit schmaltzy for my taste, but I’m probably more curmudgeonly than most of you.

The lovely Ms. Geffrier, who somewhat resembles a young Julianne Moore, makes an appealing protagonist, deftly portraying her character’s emotional turmoil, intellect and commitment to the task at hand. The rest of the cast largely fills standard genre types, with Dashwood’s megalomaniac and Olivia Cote’s Sylvia (the leader of the environmentalists) getting the juiciest supporting parts.    

The f/x are quite well done, with much of the oceanic action bringing cinematic quality to the small screen.  The Normandie locations provide a lovely backdrop, with the town of Fecamp looking like the cleanest, most picturesque industrial fishing village one could find anywhere. 

RATING: 2 1/2 out of 4 stars

SEA SHADOWS, in French with subtitles, premieres June 2, 2026 in the U.S. and Canada on MHz Choice.

https://watch.mhzchoice.com/sea-shadows