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.

London police detectives Cassie Stuart and Sunny Khan investigate historic cold cases involving missing persons, murder and long-hidden secrets.

DI Cadi John and DC Owen Vaughan try to solve a case involving Mali Pryce, a young woman whose body was discovered in a stream in the woods.

A gripping anthological relationship thriller series exploring the emotional fallout of a child's abduction not only on the family but on the wider community, told over two time frames.

Sakuragi Izumi (Ueto Aya) is a new police sergeant with the Special Investigations Office, which was set up within the Metropolitan Police in November last year. The new investigation team uses DNA analysis and the latest in forensics science to investigate cold cases as well as cases suspected to involve missing persons.

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.

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

Detective superintendent reopens two unsolved murder cases from the 1980s. Forensic methods link the crimes to a string of burglaries. Steve's team has to find more evidence before the perpetrator is released from prison.

Tense new series exploring cold cases from victims death to criminal convictions.

Northern Irish police officer DCI Tom Brannick connects a suicide note with an infamous cold case with enormous personal significance.

A village holds spirits of missing, deceased people. A search to find the missing bodies and discover the truth behind their disappearance occurs.

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.

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.

After Birgit Meier vanishes in 1989, police missteps plague the case for years. But her brother never wavers in his tireless quest to find the truth.

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.

Marie-Claude Savard and Sébastien Trudel propose a new investigation into a legal case that captivated Quebec in the 1980s. On December 15, 1987, Michelle Perron, 45, was found dead in her car. Her husband, director Gilles Perron, was at the scene of the crime. Thirty-three years later, the identity of the murderer remains a mystery.

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