NCIS Season 8 Episode 4 : Royals and Loyals
The team is involved in an international incident as they investigate the murder of an American petty officer whose case is connected with a Royal Navy ship. Complications ensue when someone tries to get the ship to depart before NCIS can properly investigate. They discover that the murder was over a large amount of stolen CIA money, used to pay off warlords and dictators in Afghanistan. At first, the team suspects that the Royal Navy liaison officer is responsible, but quickly find out that he is actually an MI6 agent who was framed for the theft. With his help, they track down the real culprit, the corrupt CIA handler who was in charge of the money.