As JJ prepares to leave he and Beth celebrate their engagement. Beth and her mother can not seem to agree upon anything while JJ and Meg continue to fight about Drew. Will is still in the hospital. Roxanne continues to tour with Lenny. Roxanne decides that she loves Lenny but she can not continue to tour with them.

Roxanne begins to question her relationship with Luke. Meg lets Patty drive the family car after Patty blackmails her. Meg ends up crashing the car. After Beth tells her parents about her pregnancy they give her two options. JJ and his squad rescue American POW's. JJ thinks one may be Danny O'Conners brother.

As the anti-war movement gains momentum, Meg and Sam get caught in the crossfire at an anti-war rally and finds themselves taking a stand that may have severe consequences in their future. Jack also takes a stand on Beth and her marital status as he begins his campaign for city councilman. Helen makes a shocking discovery at work and Patty , disappointed with her first date, turns to Roxanne for advice. Meanwhile, JJ and his squad are surrounded by the Viet Cong and under heavy gunfire when they are told they will not be receiving backup and will be on their own