Givens is asked to protect an eccentric judge from a mysterious and deadly attacker, while Boyd Crowder's new-found religious zeal starts to annoy the criminal community.
When a furious farmer camps outside the White House, Cal must find out if he means harm, especially when it is claimed he is armed with explosives.
A serial rapist sends a letter to the squad, announcing his return to Philadelphia after five years, and his plan to strike again.
Oz delivers a relic to Angel that will render him invincible, but Spike is determined to fight Angel to the death for the otherworldly artefact.
Aiden meets the ghost of a little girl who passed away from leukaemia. Melinda worries for her son's safety when the ghost threatens Melinda to stay out of her way.