As opposed to its sister series ``See No Evil,'' which details unlawful activity rooted out with the aid of surveillance cameras, ``Hear No Evil'' uses authentic audio recorded at crime scenes to build each episode's narrative. The recordings, captured by victims' families, investigators and the killers themselves, reconstruct the murderous acts with the aid of first-person testimony, stylized re-enactments and video archive. The result is a series that ultimately lets viewers' imaginations and instinctive fears of the unknown come to the fore.