A girl is contacted by a man claiming to be her father, prompting Detective Lilly Rush to reopen the case of a teenage boy who was killed on the same night the girl was born.

The death of a young woman at a fraternity is reopened when a picture of her appearing to be in distress surfaces.

The 1978 murder case of a man is reopened when a letter suggest his death may not have been connected to a similar crime, as originally thought.

The 1945 death of a baseball player is reopened when new evidence comes to light.

An elderly woman is found dead living under the identity of a woman who died in 1954. Upon hearing this news the son of the woman prompts her case to be reopened.

When the fourth of five brothers is killed Lily reopens the case of the first brother’s death. She believes the cases are connected and she is trying to save the youngest brother from the same fate.

A diary discovered on a recycled computer leads Lilly to reopen the 1999 death of a healthy young woman from a stress-induced heart attack.

A box of POW bracelets found in an abandoned drug house lead Lilly and the team to reopen the 1972 shooting of a Vietnam veteran.

When evidence of a 4-year-old girl's death washes up on the New Jersey shore Lilly and the team reopen a 1965 case.

Danny and Lilly reopen the 2001 case revolving around a well liked local deli owner thought beaten to death by his employee.

In 1988, a young man is gunned down on a highway after his car is hit from behind and a woman riding with him is wounded. The case was thought to be a routine carjacking until the woman disappeared from the hospital where she was being treated.

When a small piece of a note is found, Lilly and the team reopen the 1994 death of a teenager previously classified as a suicide.

Lillian begs Lilly and the team to search for her daughter's killer when a newspaper story reports on a man pushing his wife down the stairs. The circumstances of that death seem eerily similar to her daughter's, and the same man was her escort to the 1968 debutante ball.

Lilly finds a link from a recent string of bank robberies where the thieves wore Johnny Cash masks that may provide new information on the murder of a young bank teller who was killed during an almost identical robbery in the year 2000. However, Lilly's trail runs cold and now the team must retrace each step of the 2000 case in order to find the killer at large.

In 1998, Valens' worked undercover on a high-profile drug case that is reopened and now he must face the demons that have been haunting him for the past eight years. Valens' got too close to a lady friend that was being used as a drug mule and it might have cost her life. The entire squad is shocked to know that Valens went undercover and had never mentioned it to anyone, which casts an even darker cloud upon him.

In the course of one night, the team is pushed to their wit's end trying to crack the code of a killer and rescue a boy left to die at an undisclosed location. In the end, the answer will lie in one man's past and the only way to get there is for Lilly and the team to delve deep into their own.

Lilly receives new evidence in the 1973 murder of a young female college tennis star. Who beat the college's best male player in a high-profile match that might have cost her her life.

When a theater owner discovers a .38 slug in a piece of set furniture that is not being used as a prop, Lilly and Jeffries reinvestigate the 2002 case labeled the Cabaret Murder, which involved the shooting of a local cabaret singer. In 2002, Dennis Hofferman joined a community theater as a cabaret singer, but on opening night he never made it to the stage to break a leg. Instead, he was shot to death directly outside the backstage door. His murder was considered one of several shootings and muggings committed by local robbers who were never caught, however, all evidence pointed to someone inside the theater. Most of Dennis' theater friends called it the greed-eyed monster that killed him and now Lilly and Jeffries begin their quest to catch a killer.

When a pregnant woman researching her family history comes across disturbing news that her great grandmother, Violet Polley, was murdered and the case was never solved, Lilly tackles the 1929 case, her oldest to date. While the team is dealing with massive case backlog, they roll up their sleeves and dust off the few notes from the crime which only reveal that Violet Polley was from the wrong side of the tracks and became pregnant by a man, Nick Bartleby, who was considered royalty. Most, if not all, of the suspects from 1929 are either dead or their memories aren't reliable, however, they find the grandson of Bartleby's driver and discover recorded tapes that might lead her in the direction of the murderer. Meanwhile, Lilly's mother, Ellen (guest star Meredith Baxter), announces her engagement and wants nothing more than her daughter to stand beside her during the ceremony.

The 1994 rape and murder of a 16-year-old girl is re-investigated after a death-row inmate convicted of the crimes who is scheduled to be executed in three days calls Jeffries claiming that he's innocent. His statement is given weight by the fact that the arresting officer in the case just committed suicide during the course of an Internal Affairs investigation.

Lilly and the team tackle a 1945 case involving an ambitious reporter recently demoted to writing trivial advice columns after a heady period covering Eleanor Roosevelt and women's rights.

A new witness to the 1984 shooting of a well known ER physician comes forward prompting Lilly and the squad reopen the case.

When a drug counselor’s debit card is used one year after his death Lilly and the team reopen the 2005 case.