When Reid discovers that his girlfriend has been kidnapped by her stalker, he and the BAU team band together in hopes of finding her before it's too late.
The team investigates when the daughters of a writer go missing, but it coincidentally falls on the anniversary of their mother's disappearance one year ago.
Billy the Kid and his band of Old West outlaws, head for the hills of Mexico, while a band of men determined to bring them to justice, follows close behind.
Gibbs sends Ducky undercover to catch an international arms dealer, but Jenny's personal vendetta and a rival agency's interference hinder the operation.
An explosion in a mausoleum leads the NCIS team to discover the remains of five people, and they hope the families can make some connection between the victims.
Ducky is startled by a Marine, believed to have been frozen to death, when he wakes up before his autopsy begins; a trip to Baghdad is linked to Gibbs's past.