While still in NY, Rush agrees to help FBI Agent Cavanaugh investigate the murder of an Army recruit, David Quinn, when he was found shot to death at Woodstock in 1969. Cavanaugh's Director wants them to them to take a closer look at this cold case even though no new evidence warranted it being opened. Back from a break from his first tour of duty, Quinn shows up at Woodstock to track down Annabelle, a young lady he met and fell in love with while on a train to Fort Dix. Quinn unsuccessfully tries to convince Annabelle to run away with him to Canada. Annabelle, it turns out, was an informant for the FBI and was working undercover at Woodstock to weed out any extremist trying to bomb recruiting facilities. Rush and Cavanaugh track her down and realize that she is now a NY congressman. Cavanaugh's Director wanted them to re-open the case hoping that if Quinn's murder is solved Annabelle will sign off on funding a FBI Cold Case division. Every anti-war protester becomes a suspect as Quinn stood for everything they were protesting against. In the end our doer turns out to be Howard Wasserlauf, a local farmer and injured vet who unsuccessfully attempted to re-enlist for duty for the past 11 years. Quinn and Annabelle snuck into his barn to spend the night and Wasserlauf caught them. Realizing that Quinn was a soldier, Wasserlauf befriended him up until he discovered that Quinn was going to run away to Canada and ignore his second call to duty. Vera ex-girlfriend, Megan, comes to Vera desperate for answers after her house is broken into and sentimental jewelry is stolen. It turns out Megan's husband, Rick, staged the robbery when his mistress shows up at his house. Yates takes some personal time off to be with her mom who is ill. Stillman shows up to support her. Rush contemplates working for the FBI.