Episode guide

At Oxford’s Bodleian Library, a celebrated professor collapses mid-visit, his tongue eerily white, throwing the cloistered halls into alarm. Teen sleuth Pierre Durand follows a trail of rare-book loans, academic rivalries, and a final, silent clue left by the victim’s outstretched hand. As the police seal the exits, Pierre assembles a cool, ingenious solution that reveals how knowledge itself became the perfect weapon—without giving away the culprit. 

In a private room deep within the British Museum, a mysterious sketch surfaces—an alleged work by Leonardo da Vinci, portraying a strikingly modern bicycle. As a select group of experts gathers to assess its authenticity, 18-year-old Pierre Durand is invited to observe. With tensions simmering among curators, collectors, and staff, the atmosphere grows dense with ambition and suspicion. Before the final verdict can be reached, Pierre senses that the true revelation lies not on the paper, but in the room itself. 

On a rainy evening in London’s Covent Garden, a glittering stage crown vanishes during a blackout at a packed theater. With the audience locked inside and the police baffled, 18-year-old Pierre Durand is asked to assist from the royal box. Among dancers, stagehands, and suspicious patrons, Pierre must navigate shifting alibis and backstage illusions. Before the final curtain falls, he’ll uncover not just how the crown disappeared—but who orchestrated the perfect theft in plain sight. 

When Europe’s most captivating actress arrives in Paris, she brings with her a beauty that disarms—and a charm that blinds. After a lavish soirée ends in the death of Lord Redgrave, 18-year-old Pierre Durand is pulled into the affair not as a distant observer, but as the young man she personally seduced the night before. With his judgment clouded and the truth hidden beneath velvet words, Pierre must confront the question no one dares ask: what if beauty itself is the perfect crime? 

Invited to a quiet weekend in the Scottish countryside, Pierre Durand and Inspector Fawcett join a group of guests at Balgowan House—a manor where tradition, pride, and secrets reside under one stone roof. But when the marble bust of Socrates disappears during the night and a window is found shattered, panic spreads through the house. The alibis are flawless. As suspicion shifts from outsider to insider, Pierre must pierce through polite lies and social masks to expose a perfectly staged illusion—and reveal a truth no one dared to admit. 

During the glittering premiere of The Secret of Shadows at London’s Royal Regent Theatre, the audience is swept into glamour, champagne, and praise—until a scream shatters the night. Margaret Welles, the film’s radiant lead, is found dead behind the scenes. With doors locked and alibis stacking up, Pierre Durand is asked to assist in the investigation. Moving through the echo of jealousies, egos, and backstage lies, Pierre must discover who envied the spotlight enough to kill for it—before the final curtain falls. 

In the heart of Saint Albans' bustling market, a quiet bookshop becomes the stage for a curious confrontation: a man accuses the bookseller of swapping his money, while the seller insists he’s been handed a counterfeit note. As tempers flare and bystanders gather, Pierre Durand steps in, still just eighteen but already known for his unnerving calm. With only a single banknote and a peculiar detail about its serial number, Pierre must unravel a deception where the truth hides in plain sight—and the falsehood is all too real. 

At a luxurious wellness retreat on the windswept coast of Cornwall, a safe is broken into during the night, and every guest seems to have an alibi—too many, in fact. Among herbal teas and polite conversation, Pierre Durand senses a performance in progress. But it’s not a confession, a footprint, or even a camera that reveals the truth. It's a single word, spoken by the one witness no one expected: a young parrot who heard more than anyone realized. As suspicion turns to silence, Pierre’s cleverness once again breaks through the fog of deception. 

Summoned by Britain’s Secret Intelligence Service, 18-year-old Pierre Durand slips into the Royal Hall of the Monte Carlo Casino to unmask a traitor among five glittering VIPs: Geneviève Charpentier, Victor Chevalier, Édouard Bellec, Paul Lambert, and Alma Bertrand. Beneath chandeliers and roulette murmurs, he trades courtesies and questions, reading posture, hands, and ego with surgical calm. The suspects could not be more different—an art-world peacock, a gourmand magnate, a brooding gambler, a reserved widow, and a woman whose poise hints at sharper edges. As the night deepens, one understated observation turns charm into certainty—guiding Pierre to the spy hiding in plain sight. 

On the eve of a bank holiday in Cognac, Pierre Durand returns to the square of his childhood. Three new, side-by-side shops have appeared, and with them a few details that don’t sit right. Without being asked, he sets out to help a local policeman keep the town’s perfect bank-robbery record—and to quietly reassure an old friend whose savings depend on it—Pierre trusts patterns over chatter. By night’s end, he aims to show the officer he’s still more than capable, and to keep both a small town’s security and a friend’s future intact.

Paris, 1925: at the Phare Écarlate, cigarette smoke and cognac hang in the air as a jazz set electrifies the room. When the applause fades, a shout cuts through the haze—the night’s cash has vanished. Inspector Beaumont arrives and, recognizing Pierre Durand, asks the young sleuth to lend his eye. Backstage and beyond, a guitarist, a bassist, a drummer by the door, and a singer at the bar give their accounts as the clock creeps toward dawn. In a night tuned to rhythm and rumor, Pierre listens for the one note that doesn’t belong—and follows it to the truth. 

On a bitter January day, Pierre Durand returns to his old lycée to speak with the younger students who’ve read his name in the papers. When a beloved teacher asks when he first knew he had a mind for deduction, Pierre recalls a long-ago winter lesson: a silent classroom, a small act of mischief, and a calm demonstration that reason can see what eyes cannot. In that moment—measured, elegant, and quietly astonishing—Pierre learns that the surest path to truth may be as simple as noticing what others overlook.