The serial killer resurfaces after 20 years of silence and contacts the Behavioral Analysis Unit with the promise that he will kill another victim in the next five days. As the team springs into action, Gideon enlists the help of a former colleague who worked the case when it was fresh to help find the killer.
In the final episode of the groundbreaking series, Dexter is faced with impossible odds. A brewing hurricane is about to touch down on Miami and Dexter has to end things his way.
Shawn and Marlon must protect Dee from an amorous con man.
A love triangle leads to the death of a teenage girl, and a woman Naval officer goes on trial for murder. On live TV Mac and Bud prosecute, and one of Mac's law professors defends. Harm investigates an apparent suicide aboard a carrier.
Agent John Doggett heads an FBI manhunt to locate Mulder, while Scully and Skinner use information supplied by the Lone Gunmen in their quest to find their colleague.