Guillermo del Toro is bringing Naoki Urasawa's 18-volume manga series Monster to HBO. The material was previously adapted as the animated series Monster.

The story follows a doctor who scours the world for the most evil sociopath in human history, a 12-year-old boy. When the physician tries to save the boy, he starts a murderous chain of events.

Guillermo del Toro is hatching the story with Doctor Who and Sherlock writer Steve Thompson, who will write the pilot script.

The project was initially set up as a feature at New Line Cinema, but the story was deemed too massive to be covered in a single film. Guillermo del Toro and Steve Thompson will executive produce alongside Susan Montford, Don Murphy, and Gary Ungar. No production schedule was given.