Veteran journalist Paula Zahn steps out of the studio and into the field to unravel criminal investigations, tracking the drama of each story by featuring the opinions of those closest to the case, including law enforcement officials, the families of the victims and the incarcerated, lawyers from both sides, and first-time TV interviews with convicted murderers.

Dark dreams see the light of day in "Your Worst Nightmare," a typical Investigation Discovery true-crime series complete with jump-out-of-your-seat moments and chilling conclusions. Classic suspense film techniques highlight re-enactments of creepy, harrowing crimes, as victims' darkest dreams become unfathomable realities. Each hourlong episode features one story interlaced with commentary from law enforcement, criminal justice professionals, and psychologists, plus accounts from friends and family of the victim.

Reexaminations of cases in which unanswered questions still remain; includes interviews with law enforcement personnel, family members and private investigators as well as news footage and social media posts.

Living in a surveillance society means everyday actions are caught on camera, mostly of honest citizens going about their routines. Video, however, doesn't discriminate; criminals also end up on film. "See No Evil" presents dramatic stories of crimes being solved with the aid of surveillance cameras. Testimony from police, eyewitnesses and families are woven into re-enactments bolstered by actual security-camera footage, which helps unlock answers to cases that otherwise might have remained unsolved and left dangerous perpetrators at large.

Using dramatic re-enactments bolstered by police reports and forensic evidence, Investigation Discovery delves into the minds of female killers in "Deadly Women." Each episode focuses on four different cases in which women, for a variety of reasons and with a variety of methods, chose to take the lives of others. Stories featured include more recent cases, like that of Andrea Yates, the Texas woman who in 2001 drowned her five children one by one in the bathtub and then called police, to older cases like that of the "baby farmer" Sarah Makin in 1890s Australia, who killed illegitimate infants left temporarily in her care.

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.

Most homicide detectives would rather forget what they see at gruesome crime scenes. Pat Postiglione is not like most detectives. He has the gift of a photographic memory. Coupled with a laser sharp eye for evidence and the ability to detect microscopic clues, Postiglione is one of the most valuable detectives in his Nashville, Tenn., precinct. During his more than 25 years working homicide, he has seen hundreds of crime scenes, and he remembers each as if it happened yesterday. For the first time, he recounts his most memorable cases, walking viewers through the locations in exacting detail. Episodes feature each crime scene re-created based on police records and Postiglione's unparalleled memory.

With one quick click the internet allows people to share information like family photos and professional accomplishments, making it easy to ignore or forget that behind clever screen names and witty captions is a dark digital world with real dangers and risks. In hour-long episodes, "Web of Lies" unravels tragic stories of deception and manipulation triggered by online interactions, from predators lurking behind Facebook profiles to creeps scouring chat rooms for their victims. Re-enactments are buttressed by comments from law enforcement personnel, true-crime experts and psychologists, plus first-person accounts from friends and families of the victims.

Investigation Discovery and People magazine partner to re-examine some of the most high profile crime cases in recent history. The one-hour series brings viewers tales of betrayal, buried secrets and unsung heroes, ripped from the pages of one of the nation's top weekly magazines. These stories transcended news and became part of pop culture, revealing shocking twists, new evidence, and unexpected resolutions. Interlaced within every episode are exclusive interviews with People's journalists, archival footage, re-creations, and firsthand accounts by those closest to the investigations.

The dark side of the Sunshine State is revealed through tales of intrigue and murder.

The urgency and intimacy of local news reports capture the murder investigations that turned small towns and communities upside down.

Investigation Discovery's "The Murder Tapes" chronicles homicide investigations using raw and unfiltered footage, including body-cam, surveillance and interrogation-room footage. Family members react in real time, investigators give their first impressions at crime scenes and suspects protest their innocence before coming clean. Viewers see and hear it all, getting up-close and personal with real-life murder investigations. Episodes track cases from start to finish, proving that the truth wins out when tapes roll.

There's a reason murder investigations don't begin with preconceived notions. Sometimes those least expected to be capable of committing such dark deeds -- respected role models and trusted members of the community -- can have a sinister side. "Unusual Suspects" documents baffling, challenging investigations, actual cases that were anything but cut and dry. Episodes feature in-depth interviews with leading law enforcement personnel combined with stylized re-enactments, illustrating how illusive offenders evaded capture for years before being undone by persistent police work.

In "Impact of Murder," Investigation Discovery uses the victim impact statement as a storytelling device. These statements are delivered in court allowing a family member or friend to describe the impact of a crime. They are a source of strength for those who feel helpless in the face of a senseless crime, and they help crime victims recover from the collateral damage inflicted, giving them a sense of power as they stand up in court to address the perpetrator. Through the victim's words, viewers come to understand the emotional damage endured as well as the significance of the life that was taken.

Pairing actual crime scene video with real home video to create an intimate and emotionally powerful mystery.

"Betrayed" reveals chilling stories of chasing the American dream and how the veneer can dramatically crumble, ending in murder at the hands of a trusted family member, co-worker, lover, or friend. The cases of deception are told through the lens of the fictionalized, first-person perspectives of the victims. As investigators, family, and friends peel back the layers and facts of each case, the otherworldly narrator already knows where the trail ends. The narrator guides viewers through various relationships, raising suspicions about who will commit the ultimate betrayal.

For better and worse, a work environment represents a microcosm of society. While lifelong friendships are formed at a job, and perhaps it's a place where people even meet their future spouses, working alongside others also increases the likelihood that creeps may be close by. "The Killer Beside Me" exposes the dark underbelly of workplace relations, where romantic rivalries and power plays culminate in murders. Cinematic re-enactments form the basis of the true stories, and interviews with family and friends of victims and law enforcement personnel lend support.

From blushing brides turned cold-blooded killers to smitten grooms with shocking dark sides, "Fatal Vows" examines the criminal psychology behind deadly divorces. Guiding viewers through actual stories of love gone wrong are psychotherapist Stacy Kaiser and forensic/clinical psychologist Dr. Brian Russell, who examine each couple to better understand how the marriage turned from flawed to fatal. Stylized re-enactments are supported by interviews with family, friends, law enforcement, and potential victims of the crime, while Kaiser and Dr. Russell provide analysis on unions that break down until divorce and murder collide.

If you're going to do the crime, you might as well do it with passion. "Scorned: Love Kills" is perfect Saturday night TV for those who prefer a voyeuristic peek into how lust and obsession can destroy lives. From dalliances with strip-club dancers to teachers falling for their students, the stories featured in this series mix sexual intrigue with bedroom betrayal to form a scandalous recipe for murder.

True-crime stories about murders that take place among close-knit groups of people, including coworkers, neighbors and community members.

Never forgetting what happened to loved ones who have been murdered is a way of paying respect, however horrifying and raw those memories may be. The recollections can come in handy too, like when they contain critical clues that help detectives piece together the final hours of the victim's life. This series examines that aspect of homicide cases, with each hourlong story told through the memories of family members, friends, and investigators, plus images from the time of the crime that still haunt and are unforgettable.