Channel 4's 'gripping' 6-part France-set mystery thriller will be your next binge-watch


The psychological mystery, Promethea, arrives on Channel 4 in August


close-up of teen girl with older woman© T.Langro
Nicky MorrisActing TV and Film Editor
July 8, 2025
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Mystery thriller fans, listen up! A gripping six-part series is about to arrive on Channel 4 – and it could be worth adding to your list of must-watch shows. 

Promethea, which comes via Channel 4's offshoot streaming service Walter Presents, blends psychological mystery with supernatural suspense and coming-of-age drama, and follows a 17-year-old girl who begins experiencing disturbing flashbacks of a brutal murder after waking up from a car accident with no memory. Intrigued? Here's all you need to know.

© T.Langro

What is Promethea about?

Billed as a "gripping new thriller that blends psychological mystery, supernatural suspense, and coming-of-age drama," the story opens when Charles and Caroline Lasset accidentally hit a teenage girl with their car.

But when the teen stands up, unharmed, confused, and with no memory of who she is, the only clue is a strange name that means nothing to her: Promethea.

The synopsis continues: "Taken in by the family who accidentally struck her, 17-year-old Promethea begins to experience disturbing visions - flashes of a violent murder that took place weeks earlier. As she pieces together the fragments of her shattered identity, questions start piling up: Is she a witness? A victim? Or something far more dangerous?

"With each episode, secrets unravel. A hidden key. A missing body. A growing sense that Promethea is more than just a girl with amnesia, that she's part of something much larger, and possibly deadly.

It concludes: "As she begins to uncover extraordinary physical abilities, Promethea realises she may not want to know who she really is. But someone out there does. And they're watching."

© T.Langro

Who stars in Promethea?

Fantine Harduin leads the cast in the title role, starring alongside Camille Lou as Elise, Odile Vuillemin as Marie, and Margot Heckmann as Vanessa. 

Meanwhile, Thomas Jouannet and Marie-Josée Croze play Charles and Caroline Lasset.

© T.Langro

When will Promethea be available to watch?

The series launches on Channel 4 on 10 August. The box set will be available on Walter Presents via C4 streaming on 8 August. 

© T.Langro

Other dramas to watch on Channel 4

Channel 4 has plenty of gripping dramas on offer, including the six-part series The Shadow, based on Melanie Raabe's bestselling novel, about a journalist who hears a prophecy that she will kill a man, prompting a series of unfathomable events.

Meanwhile, detective drama fans can tune into Pale Mountains, a four-part series set in the scenic Alpine city of Bolzano, where an ambitious DA and a tortured detective must put their differences aside to catch a serial killer on the loose.

Some other unmissable shows on Channel 4 include The Handmaid's Tale, Long Bright River, Little Fires Everywhere, Patience, and Get Millie Black.

WATCH: Love Channel 4 dramas? Check out Get Millie Black

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