An arsonist sets a fire at a car dealership that kills a sales person. The name of an extremist environmental group is spray-painted on the scene, but the group denies involvement. It becomes Don's task to determine whether the group or someone else is responsible. Charlie is called in to help figure out if there is a pattern to the fires that would help provide a profile of the arsonist.

The case of a dead minor league baseball player leaves Don and the team with more questions than answers. When Charlie discovers that someone has come up with a statistical analysis that can identify which of the players are on steriods, the case gets more leads...and a suspect.