When a radical environmentalist group blows up an SUV, the F.B.I looks into the case with the help of a victim from one of the environmentalist group's earlier fires. Meanwhile, with his cholesterol off the charts, Myles decides to make some changes to his dietary lifestyle.

A famous actor visits the F.B.I to observe as the team tracks down a gang involved in selling fire arms. Later when the team gets word of a possible terrorist threat, the movie star begins to show interest in Tara.