For more than 25 years, Dateline has brought viewers investigations into some of biggest mysteries in America. This entry in the franchise takes a second look at some of the most mysterious cases of recent history. It explores the stories through firsthand accounts told by people who are close to the crime, including investigators who dedicated their time to the cases and family members who are still trying to confront the tragedies that befell their loved ones.

跟随前检察官凯利·西格勒和犯罪现场调查员尤兰达·麦克拉里一起破案。

Exploring the unbelievable true stories of suspicious deaths by retracing the investigation from start to finish, dissecting the red flags and undeniable evidence, and strange behavior that put the tragedy in question.

A cast of young women, who recognize that their outrageous behavior has hindered their relationships, careers and lives, are brought together in a beautiful mansion. They claim they want to change, but will living together help them move forward and turn their lives around – or will chaos rule?

The fascinating cases of every day, seemingly average moms, wives and girlfriends accused of murder. Did they really do it? And if so, why?

The Janice Dickinson Modeling Agency was a reality television series that debuted on Oxygen on June 6, 2006. The show completed four seasons, through which it followed the self-proclaimed world's first supermodel Janice Dickinson as she took on the role of a modeling agent to her own eponymous agency, also called The Janice Dickinson Modeling Agency, which opened for business in November 2005.

The first season follows her opening of the agency, including the difficulty in finding models of Janice's vision, getting them proficient in front of the camera, obtaining financial backing and establishing a reputation for her agency. Subsequent seasons followed the development of the agency and a constantly changing cast of models. A number of the male models are openly gay, and a number of the agency's clients are gay-oriented businesses. This resulted in many of the episodes being gay-themed.

Oxygen aired a one-hour holiday special to bridge a gap between the first and second seasons, entitled Christmas with the Dickinsons.

In the UK, there was to be a British version of the show with supermodel Paula Hamilton as the agency head. Like the American version, the show was to be titled after the lead. It was to be shown on the cable channel Living, which is also the home of the Top Model franchise in UK. After much planning, the show was canceled due to a lack of interest in the American version.

An up-close and personal look at a team of 911 dispatchers at a call center just outside of Cleveland where they take on a never-ending bombardment of panic-stricken callers and save lives.

This extension of the long-running true-crime series 'Snapped' shifts the focus to couples whose passion drives them to commit terrible criminal acts. Using re-creations and gripping firsthand accounts, each episode takes a deep dive into a case, telling the story of the couple's romance, how the relationship evolved from love to manipulation, and what ultimately drove the couple to commit the crime.

Performers compete for a multi-episode guest-starring role on season three of hit series Glee. Over the course of the competition, the winner will be determined from eliminations of twelve finalists and be awarded a role in a seven episode arc as part of the cast of Fox Network's musical drama series Glee.

This new series investigates the jaw-dropping cases of murderous doctors, nurses and medical professionals.

Portrayal of the horrifying cases that highlight the boundaries between gentrified Southern dynasties, hip-hop hustlers and the flashy nouveau riche of this metropolitan mecca of music, entertainment and tech. Told by the investigators, witnesses, reporters and loved ones who have direct connections to the cases, each hourlong episode brings Atlanta's hustle and deadly decadence into sharp focus. It's the dark side of the New South, where deadly battles for status and affluence emerge between those who are willing to kill for the good life and those willing to kill to keep it.

Tori & Dean: Home Sweet Hollywood is an American reality series on Oxygen. The series debuted on March 20, 2007. The first and second seasons of the series were titled Tori & Dean: Inn Love. The show was renamed Tori & Dean: Home Sweet Hollywood as of the third season.

As of November 2012, the series has yet to be renewed for a seventh season.

A series that dives into the dark world of contract killings, showcasing some of the most fascinating murder for hire cases ever caught on tape.

深入了解纽约市近代史上一些最令人不寒而栗的谋杀案。纽约市是世界各地人民的机会灯塔，也是真正的大熔炉。这是一个有着坚韧核心的城市，那里的紧张局势很高。一系列只有在纽约才能发生的厚颜无耻的罪行的细节，以及执法部门和平民争相将杀人犯从街头带走的紧张工作。

Hey Monie! is an animated American black sitcom produced by Soup2Nuts. Originally part of the series X-Chromosome, Hey Monie! aired on Black Entertainment Television and, afterward, on the Oxygen Network in 2003. The series aired on The N from April 19, 2004 until April 25, 2004, only to be removed a month later. Its main character, Simone, works at a public relations agency in Chicago. She lives in an apartment building with her best friend Yvette. The show chronicles her life living as a single career woman in the big city.

The series' voice talent included the Frangela duo; Angela V. Shelton as Monie and Frances Callier as Yvette, Melissa Bardin Galsky and Brendon Small.

It centers on the hidden dangers and some of the killers investigated in the region around the Florida-Alabama border, known as "Floribama."

Faith Jenkins investigates burgeoning romances from their sweet beginnings, and follows what happened all the way through to their bitter endings. With her background as a criminal prosecutor in the Manhattan District Attorney's Office, and her expertise in matters of the heart, Faith gives her professional POV of the nightmarish cases. With firsthand accounts from victims' family, friends and law enforcement, each episode reveals the inner workings of intimate attachments that seemed fated to last forever and ended in murder.

A true-crime series that examines the story of sadistic and meticulous killers who plan their victims’ murders for weeks, months or even years. Each stand-alone episode is brought to life through a tapestry of firsthand interviews with investigators and those close to the victim. Over the course of the hour, we’ll follow detectives on a winding investigation.

The holidays are meant to be a time of festive cheer when family and friends come together to celebrate the season. But when family members are forced to occupy the same space for too long, the joy and merriment can often morph into anger and resentment.

A series of reports chosen by "Dateline" correspondents that answers the question they most often get asked — what their most memorable story is and why.