Pierce tracks the killer of a student while defending the victim's boyfriend, who is suspected of being mentally ill and guilty of the crime. Meanwhile, Pierce faces his feelings as Moretti's wedding approaches.
Pierce helps Donnie when Donnie finds himself in a compromising situation and evidence stacks up against him. Meanwhile, Pierce's father (Peter Coyote) assaults someone at an assisted-living facility. LeVar Burton directed.
A sniper targets the Federal Building lobby, putting Moretti and Donnie in the crosshairs. Before long, Pierce concludes that the shooter fears low-frequency radio waves. Meanwhile, a beguiling woman prompts Donnie to run for office. LeVar Burton directed.
Pierce witnesses the death of a gallery owner, but he comes to believe it was actually a murder. Pierce and Moretti try to hunt down the killer, only to end up in the middle of a daring art heist. Meanwhile, Pierce analyzes his relationship with Natalie.
A notable neuroscientist is found dead, and Pierce and Moretti must determine how the killer infiltrated the victim's impenetrable study to commit the deadly deed. Meanwhile, Pierce's father (Peter Coyote) moves in with Pierce and Lewicki.