When Dexter Collins, a young activist with a bright political future was found shot to death in 2005, it went down as a drug buy gone awry. Following a new tip regarding the location of the weapon, the police reopen the case and interview everyone from members of street gangs to his opponent for the city councilman seat.

When the mother of a missing team storms into station. The case of a witness protection member is reopened when his body is identified by the missing teen.

The team suspect a 2004 arson that killed a psychiatrist may have been caused by her former patient.

The team re-opens the case of the first ever female cadet in a local military school who was murdered in 2005.

With the team investigating the 1966 shipboard murder of a young woman traveling in steerage on a luxury ocean liner who was believed to have committed suicide by jumping overboard. But new evidence indicates otherwise. Meanwhile, the trial of a military academy official who attempted to harm Lilly begins.

The 1980 murder of a minor-league hockey player is investigated. The victim was killed on his team's home rink the night the U.S. hockey team defeated the Soviet Union in the Olympic Games.

The 1983 murder of a graffiti artist who died after spray paint was forced down his throat is investigated. Meanwhile, new details emerge about the person who mugged Valen's mother; and Lilly faces additional legal hurdles thrown her way by Moe.

Lilly and the team attend a colleague's wedding and are persuaded by Jeffries to investigate whether the bride killed her former fiancé two years earlier - just hours after he called off their nuptials.

Rush and FBI agent Ryan Cavanaugh discover their attraction for one another while investigating the 1969 murder of a GI at Woodstock, and Vera helps his married ex-girlfriend, Megan, after sentimental jewelry is stolen from her home.