Robert Dolan

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.

Doug and Carrie feel insecure about their lives after they accidentally pick up the exciting pictures of another couple.

Garcia travels to Alaska with the BAU team to investigate the murders of several residents of a small town.

Grissom and Catherine investigate the death of a woman found in a lake; Nick and Sara investigate an apparent suicide.

A serial rapist uses his position as a police officer to ensnare his victims.

Raylan investigates a murder. Meanwhile, Boyd is forced to revisit his mining days.