Rico McClinton

Sam goes undercover as a bomb specialist to investigate the murder of a Marine, while Hunter decides to change the dynamics of NCIS.

After an explosion blasts through a small town school, the team attempt to locate the bomber before another attack occurs.

A drug lord is gunned down in his Coconut Grove mansion and a suspect arrested at the scene claims he sells marijuana to Delko. As Stetler from Internal Affairs investigates, the case quickly gets personal when Horatio gets involved.

Vaughn is told to keep tabs on his wife's activities, then he finds out the shocking truth about his mother-in-law (Peggy Lipton); a monk (David Carradine) discloses the identity of the "Passenger" to a stunned Sydney.