Meg adds an anti- Vietnam War element to the high school play she is directing, which gets her in trouble with the school administration. The experience brings Meg and Chris closer together. Meanwhile, Luke's return to Philadelphia turns Roxanne's life upside down, and Melanie is jealous of Sam's relationship with Meg. As Helen experiences an uncomfortable situation at work regarding Donald, Jack is overwhelmed with his new role as city councilman. Meanwhile, JJ prepares to embark on a dangerous mission and remains unsure of the outcome.