Due to the graphic nature of this killer's crimes,

listener discretion is advised.

This episode includes discussions of murder,

necrophilia, and sexual assault

that some people may find offensive.

We advise extreme caution for children under 13.

It was a freezing day in suburban Muswell Hill, a district of North London.

In early February 1983, Snowfall had covered the quiet street with a blanket

of pure white. Despite the peaceful scene, Scotland Yard Director Peter Jay's heart was beating hard in his chest.

Jay and his officers had been staking out number 23 Cranley Gardens since 4 PM in response to a disturbing call.

A plumber who had come out to inspect a blocked drain had found something gruesome in the sewer

below, and Jay had arrived to apprehend the man responsible.

It was now nearly six, and the sky was beginning to dim with the fading sunset.

Jay and the officers moved to the building's lobby.

While they waited, Jay tried to imagine what kind of man would walk through the door.

He sealed himself for the moment, feeling both impatience and dread.

Every cell in his body hummed in anticipation.

Soon, the detectives came face to face with their suspect.

He was slim with steel-rimmed spectacles and a practical suit, Mr Ordinary.

Despite what he had done, Dennis Nielsen appeared to be terribly normal.

Detective Jay cut to the chase.

He told Nielsen they had come to discuss the drains connected to his flat.

...