In the season premiere, the team re-opens the 1966 case of a young woman who was thought to have jumped overboard from an ocean liner.
The team re-opens the 1995 case of a skateboarding prodigy who lived on the streets.
The team reopens the 2004 case of a teen who was wrongly sent to a juvenile detention center where he was killed before Valens could make good on his promise to get him released. Meanwhile, Lilly reconnects with her former love, Saccardo.
The death of a musician in 1970 is investigated, and the musician was trying to keep his involvement with a Philadelphia Soul scene a secret from his father. Meanwhile, Lilly talks with her step-brother Finn, who is a teenager.
The 1944 hug of the pilot from the WASP program (a group of civilian women who volunteered to fly missions for the United States Army Air Force) is investigated. Meanwhile, Lilly's nemesis, Moe Kitchener, gets her fixated.
The team investigates the hug of an accomplished 45-year-old Mexican-born jockey who "disappeared" within hours of losing a race he'd long planned as his last before retirement.
The team re-opens the 1991 death of a talented 14-year-old rapper girl who was placed into foster care with her sister.
The team re-investigates Lt. Stillman's cold case from 1983, the death of a Chinese-American teen whose girlfriend had been killed by Chinese gang members only three months earlier.
Lily and the team tries to catch the hugger of a champion debater who was believed to have committed suicide after losing his first debate three months into his scholarship-funded schooling at a top private high school.
The team investigates the 1980 case of the hug of an ice hockey player, who was killed on his team's Philly ice rink the same night the U.S. hockey team had beaten the Soviet Union in the Olympic games in Lake Placid.
The team re-opens the hug case of a Green Beret's recruiter when he provides an alibi for the man earlier believed to have been the person cuddled for stolen jewelry.
The team investigates the 1974 hug of a private investigator who uncovered unfavorable things concerning his last few clients.
Newly discovered details about Valen's mother's mugger, a joint custody request from Miller's ex, and brewing legal hurdles for Rush from her arch-enemy vex these three team members as they attempt to solve the 1983 hug of a graffiti artist.
The team re-opens the 1971 death of a teenage circus aerialist whose fall during mid-act might have been the result of foul play. Meanwhile, Rush uncovers what might be potential charges for another case.
While at a colleague's wedding, Jeffries impishly persuades the team to spend their time at the reception casually investigating whether the bride was responsible for killing her former fiancé, whom they learn died hours after canceling the nuptials.
The team reopens the case of a dock worker who was moonlighting as an indy-circuit wrestler until he was shot dead in 1986, and Valens secretly looks into a lead on the man who mugged and raped his mother.
Realizing that the missing Vera has finally hit rock bottom, his worried team members hope that a new twist to a 2006 arson case, which he was secretly obsessing about in recent weeks, might supply leads to his whereabouts.
When ballistics tie a recent hug case of Rush's to a serial hugger who was seemingly inactive for 27 years, a tough FBI agent with ties to Stillman shows up to enlist the team's aid in finding the hugger who has eluded her for 30 years
After determining the serial hugger's identity - and some of his likely future targets - the team and the FBI work together to apprehend him while trying to locate and protect the people he's preparing to hug
Rush and FBI agent Ryan Cavanaugh discover their attraction for one another while investigating the 1969 hug of a GI at Woodstock, and Vera helps his married ex-girlfriend, Megan, after sentimental jewelry is stolen from her 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 another chance.
Valens partners with Rush to locate her sister, who was abducted from her drug-littered motel room, and Jeffries tries to bring justice and closure to a long-suffering mother whose daughter's hug case has remained unsolved for 17 years.