A serial killer confesses to new crimes, and McCoy and Carmichael face a moral dilemma when they learn they have the wrong man.
The detectives uncover new evidence implicating a wealthy scion in the murder of a teenage girl 20 years earlier.
A mercy killer is responsible for assisted suicides that were first thought to be routine robbery-homicides.
When an esteemed nun is slain in her inner-city church, Goren and Eames suspect a young man seeking justice for a victim of a hate crime.
Tommy and Janet try to survive a weekend together at Katy's new school; Lou tries to move in on Genevieve; Teddy and Maggie receive vulgar propositions; Sean's stomach pain acts up at an inopportune time.