David Gautreaux

A secret investigation conducted by Beckett related to her mother's murder goes awry when a man she has been surveilling is killed. When evidence links Beckett to the victim, she and Castle become the targets of a manhunt that puts both of them in grave danger.

When a Navy Lieutenant is killed on his way to a private meeting with the President, the NCIS team must determine if the murder was part of a recent stream of muggings in the area or a targeted hit to keep intel secret.

Melinda learns that there is something suspicious about the house that Delia's friend recently purchased.

Five-0 is set up when a bad tip leads them to an abandoned building that is rigged to explode with McGarrett and Danny trapped inside. Xzibit guest stars as a prison informant.

Bob goes undercover as a teacher after children of government officials and foreign nationals are taken hostage, and Lissy's crush on a boy at school leads to big trouble.