Shelly Seaver is stabbed to death after a violent struggle and marked with a carved bloody Y, the MO of a Boston serial killer. A similar knife belongs to motor-rider Travis Peck, but it's the wrong size. Traces under Shelly's fingernails of a fish species common in Boston and scratches allow Horatio to find fisherman Lucas Wade, who even has the alleged 'criminal gen', an XYY chromosome. While Lucas is in custody, a new Y-carved victim is discovered by her brave young son Arthur, but soon found not quit identical, and traced to Lucas' logical accomplices. Meanwhile Ryan has a hard time with another part of his past, and Eric with jealousy when Calleigh dates a handsome lawyer. The Wade story proves more complicated...
Did You Know?
Why is Horatio standing on top of a skyscraper at the end of the episode? Sure it is a cool looking shot, but there is nothing in this episode, or in the character's history to explain why he needs to go to the top of this particular sky scraper to reflect on things that bother him. See more
I Need Your Love
Performed by Tenry Johns See more