The 1978 murder of a young man is re-opened after the victim's mother finds a letter suggesting that his death wasn't random.

The team re-opens the 2001 case of a robbed and murdered deli owner when the brother of the man convicted of the crime brings forth new evidence, suggesting the man may have been wrongfully accused.

The team re-opens the 2002 case of a murdered amateur actor when the owner of a local community theater finds a gun hidden inside prop furniture.

When the victim's credit card is suddenly used a year after his death, Lilly re-opens the 2005 case of a counselor at a teens' rehab center who was shot to death just two weeks before he was scheduled to testify in a murder case. During the probe, Lilly feels a strange connection to the victim, and her personal attachment may end up jeopardizing the case.