Channel 5 is preparing a documentary about France’s mass rape trial, which has stunned the world and is currently in its last stretches after 11 weeks of hearings. At the center of the trial is Gisèle Pelicot, a 72-year-old woman whose former husband, Dominique Pelicot, drugged her and invited men to rape her for over a decade.

Titled “The Pelicot Rape Case: A Town on Trial,” the 90-minute documentary will air on Dec. 11 on primetime. Produced by ITN Productions, the doc will provide a psychological, legal and cultural perspective, with input from the Mazan community where the Pelicots lived a seemingly idyllic retirement.

The documentary will also feature an exclusive on-camera interview with one of the alleged rapists in the case, who will be visually and vocally anonymized.

While it’s the first documentary to be announced about the mass rape trial, several others are believed to be in production,...