Michael Esparza

Meredith and Lexie's father returns to Seattle Grace with stomach pains and a new girlfriend; Alex butts heads with the new OB; Mark bribes Jackson for information on Lexie.

Gibbs and the team are called in when a couple of kids stumble upon the body of a missing Marine in a frozen lake. As the team searches the frozen lakebed for clues, they come across three more bullet-ridden bodies.

During the holiday season, Lightman goes to Afghanistan to assist in a mission to rescue two captured marines, and his only source of intelligence is an American expatriate.

Melinda must discover the truth hidden within a new family.

Jack and his team search for an 11-year-old boy, Gabe (David Henrie), who disappears from a subway station en route to Yankee Stadium for what was to be his birthday celebration. After Gabe gets separated in the station, his frantic father, Bob Feldman (David Paymer), sees him boarding a subway train. He assumes that Gabe will get off at the next stop, but that doesn't happen, so Bob searches the ballpark before calling the police. By the time Jack's squad learns about the case, the boy has been missing for 16 hours. As they begin their investigation and gather information for their Day of Disappearance timeline, the agents learn that what initially seemed to be a case of a missing child and possible abduction has become a very different scenario: The boy may have run from his dad on purpose.