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.

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

From Executive Producer Dick Wolf, this true crime investigative series follows veteran prosecutor Kelly Siegler, and her rotating team of seasoned detectives, as they travel to small towns across the country and help local law-enforcement agencies dig into unsolved homicide cases that have lingered for years without answers or justice for the victims due to lack of funding and proper forensic technology.

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.

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.

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?

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.

A deep dive into some of the most chilling murder cases in New York City's recent history. New York City is a shining beacon of opportunity for people across the world and a true melting pot. It's a city with a gritty core, where tensions run high. A series of details to the brazen crimes that could only happen in New York and the intense work by law enforcement and civilians who race to take murderers off the streets.

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.

Shocking true stories involving sex, money, murder – or a fatal cocktail of all three. Told through in-depth interviews, reenactments and archival footage, each hour-long episode delves into an edgy mystery filled with expert detective work, unexpected turns and stunning revelations.

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.

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.

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.

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.

Delve into the psychological showdown that takes place inside actual police interrogation rooms and dissect what happens to yield a confession.

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

O2Be is an American comedy television series starring Lizz Winstead and Brian Unger. The series premiered September 22, 2002, on Oxygen. After October 27, 2002, they began showing reruns on Nickelodeon until December 31, 2002. The program is a parody of daytime television with Winstead and Unger as hosts of their own talk show.

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.

Fight Girls is an Oxygen original reality television series that spun off from a 2006 special which documented seven female fighters' attempts at winning a championship. The initial special aired on August 7, 2006 and the series premiered June 12, 2007. Fight Girls is produced by Scott Messick and Tom Weber.

Similar in spirit to Spike TV's The Ultimate Fighter, ten female fighters live together and train with a Muay Thai instructor in Las Vegas for six weeks in an effort to fight for a Muay Thai championship in Thailand. The group of women is narrowed down to five via a three round fight between house mates set up by the head trainer. The losing fighter is eliminated from the house and the winner will go to Thailand at the end of the season. The theme song for Fight Girls is "Fingerprints" by Katy Perry.

True-crime stories about unfortunate victims found buried in the most unlikely of places -- the backyard.