The French true crime series broke boundaries this year when the nonfiction miniseries “Unsuspected” premiered on Series Mania.

Such a showcase is rare for a factual program, but “Unsuspected” is an unusual documentary. The four-part investigation into a crazy cold case from the 1970s, in which two filmmakers with a background in feature films and investigative journalism come together, combines archival reports with structured reconstructions, resulting in a project that defies easy categorization.

"It's clear that the lines are blurring," says Julia Schulte of France TV Distribution. "Is this fiction? Is this a documentary? It's hard to say – and we're getting to a point where those lines are harder to draw. But what's very clear is that the series is very, very entertaining."

Produced by Imagissime boss Elodie Polo Ackermann — the creative director behind the Netflix hit “Who Killed Little Gregory?” — the Series Mania-selected miniseries punctuated a mesmerizing story as it followed a Parisian psychiatrist obsessed with closing the book on a series of sexual assaults and murders that have gone unsolved for more than four decades.