The team reopens the case of a dockworker who moonlighted as a professional wrestler until he was fatally shot in 1986; Valens secretly looks into a lead on the man who mugged and raped his mother.
The team realizes that Nick Vera has hit rock bottom after he goes missing; a new twist in a 2006 arson case may help lead to his whereabouts.
After determining a serial killer's identity, the team works with the FBI to apprehend him and protect potential targets.
An attraction grows between Rush and FBI agent Ryan Cavanaugh as they investigate the 1969 murder of a soldier; jewelry is stolen from Vera's girlfriend's home.
The team investigates the 1989 case of a prom queen who may have been intentionally killed in a hit-and-run; Rush tries to ignore her father's requests to give her sister (Nicki Aycox) another chance.
Valens helps Rush search for her abducted sister; Jeffries tries to close a case that has haunted him for 17 years.
Lilly Rush interviews a maid who says she witnessed the beating death of a teenage girl during a party on a luxurious estate more than 25 years ago.
A woman asks Lilly to investigate the murder of her fiance's first wife and points a finger at an inmate serving time for an unrelated crime.
A serial rapist sends a letter to the squad announcing his return to Philadelphia after five years and his plan to strike again.
Lilly investigates the 1990 murder of a church organist who was found in an alley surrounded by crack vials and racy magazines.
Lilly investigates a case from 1973 involving a young police officer who was murdered after responding to a call at a drug-infested housing project.
A prison inmate relates a conversation he overheard to Lilly, leading her to believe the wrong man is serving time for the murder of a 16-year-old girl.
A woman emerges from a two-year coma not knowing who she is and with no memory of the unsolved murder of her 6-year-old daughter.