Robert Dolan

Garcia questions her role on the BAU team when she travels with them to Alaska for a case and sees more than she bargained for.

Doug and Carrie photos get mixed up with another couples. When Doug and Carrie look at the other couples photos, they find out that their lives aren't as good as the others, so they try to do what are seen in the photos. Arthur's new cellphone is in no use when no one calls him.

When J.D. (Zach Braff) accidentally gets stuck with a needle that may have been infected with hepatitis, he starts to shy away from dealing with his sicker patients. Meanwhile, he and Elliot (Sarah Chalke) are forced to deal with four doctors (guest stars Ed Begley, Jr., William Daniels, Stephen Furst and Eric Laneuville of "St. Elsewhere") who become ill while attending a local medical convention. Elsewhere, Turk (Donald Faison) pays a high price when he goes to Dr. Cox (John C. McGinley) to help him get in shape. Ken Jenkins and Judy Reyes also star.

Grissom and Catherine team up to solve the case of a woman found dead in a lake, while Nick and Sara investigate an alleged suicide in a fraternity house.

In the series finale, one last battle between Raylan, Boyd and Ava will determine who—if anyone—gets out of Harlan alive.