The year is 1915, and the Great War is a bloody, stagnant hell. Gabriel, a young French private, is left for dead on the battlefield. But death is not his destiny. Rescued by a shadowy organization, he is offered a harrowing choice: remain a casualty of a pointless war or become something new. He is injected with an experimental serum that grants him superhuman strength and speed, transforming him into the ultimate weapon. The price for this second chance? He must join the Sentinels, an elite, clandestine unit of similarly enhanced soldiers on a desperate mission to end the war by any means necessary.

This gripping series blends visceral historical drama with speculative science fiction. As Gabriel struggles to reconcile his humanity with his newfound powers, he and his fellow Sentinels are sent on increasingly dangerous missions behind enemy lines. But the true enemy may not be the Germans they are tasked to destroy, but the mysterious figures—like the enigmatic Le Baron—who control their fate. To ever see his beloved family again, Gabriel must navigate a web of secrets, betrayal, and the moral compromises of becoming a monster to defeat monsters.

Meet the Cast of The Sentinels

1- Louis Peres as Gabriel

Louis Peres delivers a powerful, emotionally raw performance as Gabriel, the heart and soul of the series. Peres masterfully portrays a simple soldier’s transformation from a terrified young man facing the horrors of trench warfare to a reluctant super-soldier grappling with the physical and psychological cost of his new abilities. His journey is the emotional core of the show, a constant battle to hold onto his memories of home and his humanity while being forced to commit acts of unimaginable violence. Peres ensures that Gabriel’s strength is not just physical, but also the immense emotional resilience required to endure this impossible situation.

Peres’s performance is a study in internal conflict. His chemistry with his fellow Sentinels and his haunting memories of his wife, Marthe, fuel his every action. As the missions grow more perilous and the line between man and weapon blurs, Peres reveals the gradual erosion of Gabriel’s innocence, making his quest to return home a tragic and compelling race against his own transformation. He is a hero defined not by his power, but by his desperate love and his unwavering will to survive.

2- Kacey Mottet Klein as De Clermont

Kacey Mottet Klein brings a sharp, calculating intensity to the role of De Clermont, a fellow Sentinel who may have been part of the program longer than Gabriel. Mottet Klein portrays De Clermont as a soldier who has fully embraced his enhanced abilities, viewing them as a necessary evolution to win the war. He is likely both a mentor and a rival to Gabriel, a man who has sacrificed more of his former self to become the perfect instrument of war. His cold efficiency masks his own trauma, which Mottet Klein reveals in subtle, chilling layers.

Mottet Klein’s character represents the potential endpoint of Gabriel’s journey—a soldier who has lost his past to his purpose. His dynamic with Gabriel will be crucial, as he pushes the newcomer to shed his weaknesses and fully accept his new role. Mottet Klein ensures that De Clermont is a formidable and ambiguous presence, a man who is either a pragmatic hero or a warning of the soul-destroying nature of their existence.

3- Pauline Etienne as Marthe

Pauline Etienne appears as Marthe, Gabriel’s wife, who represents the life and the humanity he is fighting to reclaim. Etienne brings a profound strength and vulnerability to the role, portraying a woman enduring the agony of uncertainty on the home front. Her character is not merely a memory; she is the emotional anchor of the entire story, the symbol of everything Gabriel is losing as he becomes more deeply entangled in the Sentinels’ missions.

Etienne’s performance is delivered through Gabriel’s flashbacks and dreams, making her presence a haunting and motivating force. Her scenes provide the stark contrast between the world Gabriel is fighting for—a world of love, family, and peace—and the brutal reality he inhabits. Etienne makes Marthe a fully realized character, whose own struggle and hope are palpable, adding a deep, emotional weight to Gabriel’s quest.

4- Ouassini Embarek as Le Baron

Ouassini Embarek is commanding and enigmatic as Le Baron, the mysterious aristocrat or scientist who likely oversees the secret Sentinel program. Embarek brings a gravitas and inscrutable quality to the role, portraying a man who views the soldiers as both tragic heroes and expendable assets in a grand, amoral experiment to reshape the outcome of the war. He is the puppet master, a figure of immense power whose true motives are shrouded in secrecy.

Embarek’s performance is key to the series’ central mystery. Is Le Baron a patriot willing to make dark sacrifices for France, or does he have a more personal, sinister agenda? His interactions with the Sentinels are charged with a manipulative intensity, as he balances promises of returning them to their families with the brutal demands of their missions. He is the face of the shadowy organization that holds Gabriel’s future in its hands.

The Fellow Sentinels: Jonas Bachan, Thibaut Evrard & Carl Malapa

The squadron is filled out by a diverse group of enhanced soldiers. Jonas Bachan plays Maximilian Neuer, potentially a German soldier captured and recruited, adding tension and a different perspective. Thibaut Evrard as Djibouti suggests a soldier from the French colonies, highlighting the often-overlooked diversity of the WWI French army. Carl Malapa as Armand completes the core team, likely another French Sentinel with his own reasons for accepting the serum. Together, they form a brotherhood forged in a secret war, their camaraderie and conflicts driving the team’s dynamics.

The Women in the Shadows: Aurore Broutin, Olivia Ross, Marie Lazovic & Fabeille Tardy

The series features strong female characters who operate in the periphery of the war. Aurore Broutin as Roxanne could be a resistance fighter or an ally providing intelligence. Olivia Ross as Irène Ferraud may be a scientist involved in the program or a figure from Le Baron’s world. Marie Lazovic as a prostitute and Fabeille Tardy as a character named “Damnée” (The Damned) represent the civilian lives touched and broken by the war, providing gritty, ground-level perspectives on the conflict.

Why The Sentinels Is a Must-Watch

• A Fresh Genre Blend: A unique and thrilling mix of authentic WWI historical drama and gripping super-soldier science fiction.

• A Compelling Hero: Louis Peres delivers a breakout performance as a man torn between his humanity and his duty.

• High-Stakes Action: Spectacular missions behind enemy lines with visceral, enhanced combat sequences.

• Moral Complexity: A thought-provoking exploration of the cost of creating weapons out of men.

To End a War, They Became More Than Men.

The Sentinels premieres September 29, 2025, on Canal+.