20/20 Britain's Most Notorious Crime Investigations

S01E04 Peter Tobin: A Monster in Their Midst

For years, the killer moved through the city unnoticed, a phantom wearing an ordinary face. But the long game finally caught up with him when a fresh set of detectives began connecting the dots—old files, overlooked clues, and a pattern that refused to stay buried. As the net tightens, the hunter becomes the hunted, and the truth he buried so deep starts clawing its way back to the surface.