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.
A woman is accused of murdering a stranger, and she must clear her name by secretly recording a confession from the man who is allegedly framing her.
Police investigate the murder of a mother who was gunned down while next to her toddler, then they find a Dictaphone that leads them down a trail of intimate audio recordings to the possible identity of her killer.
Investigators track a counterfeiter to a storage unit where they find audio recordings of him torturing dozens of women; analyzing the tapes, they realize he may be one of the most depraved serial killers in history.