William Choyce torments his wife, Alice, and daughter, Crystal, who don't discover he's a serial killer until after their escape; in this follow-up, Alice and Crystal reflect on sharing their terrifying story and reveal a new surprise.

Brian Britton guns down his family, but his sister, Sherry, manages to survive; now, she finds herself fighting against his possible parole; in this follow-up, Sherry reveals the disturbing message she received from a friend of her brother's.

In January 2017, George and Margaret Keller tell the world what happened when they discovered their son, Paul, was a deadly arsonist; now, they share what happened after the interview, including how Paul reacted to the show.

Chilling scenarios unfold in this true-crime series, which tells actual stories of people who shared their lives with loved ones who became killers. Each hourlong episode puts viewers in the shoes of the loved one, who first notices that something is amiss, interprets the puzzling signs and clues, and eventually comes face-to-face with the horrible truth: that the person has a very dark side. Exclusive interviews and firsthand accounts of the critical moments leading up to the vicious acts showcase devastating, often undiscussed consequences on the people who have nurtured, loved and raised a murderer.

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.

"Murder by Numbers" begins in a similar fashion to many true-crime series. After a body is found, an intense investigation commences, quickly turning the focus to a very likely subject. But just as the viewer eases into the case via cinematic re-enactments and through the eyes of detectives, a shocking discovery of a second body not only eliminates the original suspect, it redirects the investigation on a harrowing journey of pure criminal evil.

Here today, gone tomorrow. Thousands of people go missing in the United States each year, leaving behind only a mystery without any clues. Their stories are told in "Disappeared" through the voices of family, friends and investigators trying to solve the case, with each hourlong episode recounting the final stages that led to a person's disappearance. Interviews with experts including psychologists and forensic specialists provide new insights into what may have happened -- whether foul play was involved or the subject simply ran away.

What lurks in the shadows during graveyard shifts comes to light in this series, a quintessential Investigation Discovery offering that features nail-biting re-enactments of actual crimes in which darkness hides predators hungry for a midnight snack. Told through interviews with victims' family members and law enforcement, each story begins after a brutal crime is committed in the quiet of the night, and community members are left wondering who might be next. Investigators get to work, knowing that each time the sun sets, the body count might rise.

Investigation Discovery joins forces with reporters from People magazine to tell stories of high-end fashion icons and their couture crimes that captured headlines. The adage"if looks could kill" takes on entirely unique meaning in the series, which grants People's journalists exclusive access beyond the catwalk to reveal that fashion can sometimes be fatal. The hourlong tales of depravity, obsession, and family betrayal in the fashion world all have a common thread -- cold-blooded murder.

Real-life stories of obsessions, affairs and love triangles gone wrong.

Raw, unbridled and chilling depictions of human desires surface in "In Ice Cold Blood." True crime is depicted at another level as Ice-T takes viewers straight into the stories. Money, sex, lust, and greed run rampant with very real consequences. Family members, friends and detectives recount each case -- a missing military veteran, a student murdered in a crime of passion, and secret payouts are only some of the cases. These stories are told through re-enactments, in-depth interviews and archived footage.

Psychological thrillers like "Fatal Attraction" and "Unfaithful" are the inspiration behind this true-crime series, which tells stories about relationships that quickly spiral into living nightmares. Each hourlong episode is a mini horror/suspense film that depicts actual events -- seemingly innocent encounters that end up changing the course of the participants' lives forever. Viewers see the evolution of each relationship and the escalation of extreme behavior, from a refusal to let go to a web of lies and betrayals, dangerous obsessions, scandalous affairs, stalking, and almost always murder.