The murder of an American officer is linked to a British Navy vessel, creating a sensitive international situation.
Tony's father (Robert Wagner) returns at the request of Gibbs, who surprises the team when he enlists his help on a sensitive case.
A Navy recruiter is killed at a college fair, and the team is helped by Ducky's predecessor, Dr. Walter Magnus (Bob Newhart).
The team is surprised to find a connection between the murder of a Navy lieutenant and McGee's grandmother.
Tony's dad's a murder suspect when he's found in a car with a body and no memory of his actions. Tony is taken off the case, forcing him to disobey orders to prove his dad's innocence.
Tony and Ziva search for a missing soldier and a Navy chaplain after a marine is murdered. Meanwhile, Jimmy Palmer reveals who his best man will be at his wedding.
While investigating the assassination attempt on a foreign prince, the team learns that Tony's father (Robert Wagner) is connected to the case, and Gibbs is concerned that Tony's effectiveness will be hindered.
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