Cold Case (season 4)

The team reinvestigates a 1995 shopping mall massacre committed by two 16-year-old boys, Neal Halon and Cameron Coulter who committed suicide at the scene after video evidence found in an air shaft suggests there was a third shooter who went on the run.

The team reopens the 2004 case of Dana Taylor, a missing 30-year-old veteran of the Iraq War after her prosthetic arm is found in a river. The team examines her struggles to adapting to civilian life after losing her arm in her last tour.

The team reopens the 1948 disappearance of John "Boomer" Donovan, a sandhog miner who went missing after his remains are found in a subway service tunnel. The team discovers that the victim's death may have been linked to his union activism.

The team reinvestigates the 1982 murder of Iris Felice, a newborn baby girl whose death was originally reported as Sudden Infant Death Syndrome after discovering new evidence that her death may have been a homicide.

The team reopens the 2003 double-murder of Steve and Lisa Harris, an autistic boy's parents who were shot and killed in their car after Lilly's boyfriend brings her information suggesting that the boy might have witnessed the murder.

The team reopens the 1958 death of John "The Hawk" Hawkins, a popular disk jockey after they discover audio evidence indicating that his death may have been murder staged as suicide.

The team reopens the 1979 murder of Libby Bradley, an upper-class housewife and schoolteacher when newly found evidence related to her murder indicates that her killer may have been from the same social circle as her. Det. Jeffries, who worked on the case as a rookie cop, hopes to find the killer and fulfill the promise he made to the victim's daughter twenty-seven years ago. The team soon discovers that the victim was having an affair, causing a serious strain with her family.

The team reopens the 1975 case of Melanie Campbell, a missing 8-year-old girl after an undelivered letter written in a missing child's handwriting is found. The team sets out to determine the fate of the girl once and for all and in doing so discovers racial tensions going within her neighborhood due her relationship with a young African-American girl.

The team reopens the 1989 murder of Martha Puck, a 33-year-old woman who was shot and killed in an alley after her video dating tape shows up in the apartment of a man who committed suicide. The team soon learns that the man may have been manipulating her into committing numerous crimes.

The team reopens the 1968 murder of Sean Cooper, a young policeman with a "cowboy" reputation, who was shot to death in his patrol car after a con man hoping to secure an early release claims that the cop was dirty. The case takes a shocking turn after team learns that the victim was involved in a secret love affair with his partner.

The team reopens the 2000 murder of Truck Sugar, a country singer who was on the cusp on his big break after the murder weapon turns up. Lilly must travel to Tennessee with a reluctant Scotty in tow to reinvestigate the case.

The team reopens the 2006 case of James Hoffman, a gifted 17-year-old boy who went missing, after a video clip of him is found on the Internet. When the victim's remains are found, the team searches his school and discovers a very cutthroat environment behind closed doors.

The team reopens the 1996 death of Lauren Williams (Donna Mills), who drowned in her ex-husand's pool during a power outage, The drowning was ruled as an accident, but the discovery of the woman's fingernail underneath the diving board suggests she may have been held under and murdered. The team learns that the victim had a twisted relationship with her family, particularly with her son.

The team reopens the 2002 murders of Skill Jones and Madison Reed, two teenagers from different parts of the city that were fatally shot in different parts of town at precisely 8:03 AM, after the team discovers that the timing of their deaths may indicate a connection. They soon however, learn that the timing of the deaths wasn't the only connection.

The team reinvestigates the 1981 deaths of Jack and Johanna Kimball, a married couple who died in a house explosion caused by an apparent accidental gas leak after remnants of a bomb are found during the remodeling of their house. The team soon learns that the couple was haunted by a secret from their past as anti-war activists and their investigation leads to a shocking discovery.

The team reopens the 1964 murder of Hillary West, a 17-year-old girl and young mother who was killed the day after giving birth to a baby girl in a home for unwed mothers at the request of her daughter, who learned she was adopted after the death of her foster mother. The team learns that the home was harboring some dark secrets.

The team reopens the 1984 disappearance of Maurice Hall, a 16-year-old boy who was thought of as a runaway after his remains are discovered in a dumpster. The team learns the victim was an aspiring dancer, much to the dismay of his father.

The team reopens the 1999 disappearance of Marlene Bradford, a widowed mother of two after a station wagon containing her bones is found at the bottom of a lake. The team learns that the family was homeless and was living in the car.

The team reopens the 1987 rape and murder of Clayton Hathaway, a 6-year-old boy after his father, who was convicted of the crime is released and pushes a sex offender from the roof of a building, vowing to systematically kill a new offender each day until his son's real killer is found. During the investigation, one team member makes a poor call that threatens to derail the case.

• Song featured in the intro: "Bizarre Love Triangle", by New Order.
• Song featured in the finale: "Never Surrender", by Corey Hart.

The team reopens the 1997 death of Rainey Karlsen, a 16-year-old cheerleader who was thought to have died from an accidental drug overdose, after an anonymous confession to her murder is found in a modern art exhibit along with suspicious evidence. The investigation uncovers some of the cheerleading squad's dark secrets.

The team reopens the 1919 murder of Frances Stone, an 18-year-old girl at the request of her great grand-niece after hearing about Lily from a group meeting. The team discovers that the victim was a suffragette, much to the dismay of her family.

The FBI asks the team to reopen the 2005 murder of longshoreman Mike Chulaski, whose death might be related to a Russian human-trafficking ring that the FBI is trying to bring down. The team discovers that he may have been trying to rescue a young girl from the group.

The team reopens the 1998 murder of Jay Dratton, a terminally ill businessman, after one of his nurses confesseses to six incidents of mercy killing. The team discovers that the victim had made many enemies throughout his career, including members of his own family.

The team reopens the 2006 triple homicide of a family when the sole survivor of the shooting, the teenage daughter named Kim Jacobi (Ellen Woglom), wakes up from a coma and begins remembering details about the night of the murder. The team learns that the girl was being stalked by a man named, "Romeo." The investigation takes a scary turn when a hostage situation arises and Lilly makes the bold decision to confront Romeo one-on-one.