The team investigates a murder, where the victim is using an alias from Gibbs past. Bishop get's anxious over the thought of having to work under cover in the future, and the team learns the secret of Gibbs working as a computer nerd.
Bob is excited to talk to the kids in Gabe's class on career day. However, Gabe doesn't share Bob's enthusiasm. PJ gives great marriage advice to a couple he met while delivering chicken. Meanwhile, Teddy and Amy are busy competing against each other to impress a local children's book publisher.moreless
The BAU travels to Boston when the serial killer from one of Agent Hotchner's first cases, which involved one of the most notorious murderers in the history of New England, returns after 10 years.moreless
James Woods guest stars as a Dr. Nate Lennox, a former professor of biochemistry who was Abby's early medical school mentor. Lennox, suffering from advanced ALS and now able to move only his eyes, is admitted with pneumonia. The progression of his disease is shown in reverse through a series of flashbacks. As Ray, Sam and Luka begin limited treatment under the proxy of his attendant, Abby believes Lennox has communicated different wishes, leading to a struggle to determine what course of action should be taken, and how long to fight the inevitable.moreless
While investigating the murder of man hired to make dirty bombs that terrorists intend to set off in Miami, Horatio finds the bloody fingerprint of his brother, Raymond, who he believed to be dead. However, when Raymond's son is kidnapped, he emerges from deep undercover and the estranged brothers must work together to save the boy. Meanwhile, while processing a crime scene, an unknown assailant holds a gun to Calleigh's head and, after a deadly confrontation in her gun lab, she is left doubting that she can continue as a CSI.moreless
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