The Philadelphia homicide squad's lone female detective finds her calling when she is assigned cases that have never been solved. Detective Lilly Rush combines her natural instincts with the updated technology available today to bring about justice for all the victims she can.

A detective team apply new techniques to old crimes as they solve cold cases.

'Unforgotten' follows modern police team DCI Cassie Stuart and DI Sunny Khan, who gradually unravel long-forgotten secrets which have a dramatic impact on their investigation and the four potential suspects. The slow revelation of the secrets will also affect the personal lives of both Sunny and Cassie.

Cold Squad is a Canadian police procedural television series first broadcast in 1998 that followed the investigations of a part of the Vancouver Police Department Homicide Division tasked with solving cold cases, the titular Cold Squad, as led by Sergeant Ali McCormick.

The cast of Cold Squad was diverse and changing, McCormick being the only character to appear in all 7 seasons. Some notable series regulars include Detective Tony Logozzo in seasons 1-2, Sgt. Frank Coscarella in seasons 3-4, Sgt. Len Harper in seasons 5-7, Insp. Vince Schneider season 1, Insp. Simon Ross season 2, Insp. Andrew Pawlachuk seasons 3-7, Det. Mickey Kollander seasons 3-6, Det. Nicco Sevallis seasons 3-6, Christine Wren seasons 4-7, as well as Det. Samantha Walters and Const. Ray Chase in season 7.

Between the second and third seasons, almost the entire on-screen cast other than Julie Stewart were replaced. This along with the new sets, a significant revamp of the credits and theme music, and even having McCormick's hair change from auburn to dirty-blonde all contributed to a considerable reworking of the series.

Explore compelling cases that have gone cold for years, chronicling the journeys of the detectives who reopened them. The detectives relive the events of the crimes, reveal new twists and startling revelations, relying on breakthroughs in forensic technology and the influence of social media to help crack these cases.

Investigative genetic genealogist CeCe Moore uses her unique research skills to transform the face of crime solving. By working with police departments and crime scene DNA, Moore is able to trace the path of a violent criminal's family tree to reveal their identity and help bring them to justice.

Zettai Reido is a Japanese police procedural television drama. The first season, subtitled Mikaiketsu Jiken Tokumei Sōsa, was set in a fictional version of the Tokyo Metropolitan Police Department division that specializes in investigating cold cases, which is based on an actual division established in Japan in 2009. The first season aired from April 13 to June 22, 2010 on Fuji TV's Kakku time-slot. It premiered to a 18% rating. A special two-hour long episode which served as conclusion to the first series was aired on July 8, 2011.

Season two of Zettai Reido, subtitled Tokushu Hanzai Sennyū Sōsa takes place a year after the events of the special episode, after Sakuragi and her fellow detectives have been transferred to the undercover investigation division which deals with current crimes. The second season aired from July 12 to September 20, 2011 on Fuji TV's Kakku time-slot. It premiered to a 15.4% rating and ended with a season-high rating of 16.3%. The last leg of the second season featured guest star appearances by Yūsuke Santamaria and You Yokoyama.

True-crime thriller that follows a team of homicide detectives as they open an 18-year-old cold case that occurred in one of America's notorious body-dumping grounds, the Louisiana swamplands.

Yuri Ishikawa and her team try to crack unresolved cold cases in Kanagawa Prefecture, Japan.

Former Rhode Island police Sgt. Derrick Levasseur and forensic psychologist Kris Mohandie answer the pleas of desperate families and investigate murder cases that have officially gone cold.

What if someone close to you suddenly disappeared without a trace? Days, months, then years pass and there's still no answer. Marie-Claude Barrette follows families and friends who have lost someone close to them in their quest to find out what happened.

Based on the popular podcast, each episode focuses on a different missing person case, as Payne Lindsey and his team of investigative podcasters search for answers to help the victims’ families gain a sense of closure.

A team of specialist detectives re-look at some of New Zealand’s most chilling unsolved murders.