Yankee White (NCIS) - Plot

Plot

While on Air Force One, U.S. Navy Commander Ray Trapp dies of an apparent stroke after having lunch with the President despite the efforts of the President's doctor and medical team.

Trapp visited Air Force One only because Marine Major Timothy Kerry was sick with the flu. NCIS arrive to investigate the death, but meet some jurisdictional problems with both FBI and Secret Service who both want to take the lead.

With Secret Service agent Caitlin Todd grudgingly agreeing to help, NCIS Special Agents Leroy Jethro Gibbs and Tony DiNozzo, and NCIS Medical Examiner Donald "Ducky" Mallard examine the body and the airplane while flying back to Washington. The President is forced to use the backup-plane while the investigation is in progress.

Back at the NCIS headquarters, Ducky is autopsying the body of Commander Trapp, only to find he suffered a cerebral embolism, which is considered a natural cause of death. Gibbs wants the team to keep looking while he joins Agent Todd aboard Air Force One.

Later, another senior officer, Marine Major Timothy Kerry, is found dead in his car in Georgetown with similar symptoms to that of Commander Trapp. NCIS Forensic Specialist Abby Sciuto is able to find some poison on both Commander Trapp and Major Kerry's uniform, which could explain why they died. DiNozzo investigates both of them, finding out Trapp and Kerry used the same dry-cleaner. At Air Force One, Agent Todd tells Gibbs about her relationship with Major Kerry, resulting in an interrogation concerning her motive for his death. Todd's reaction makes Gibbs believe that she's innocent.

Todd explains the differences between the backup-plane and the main plane. Gibbs focuses on the armoury, which has locks instead of digital keypads. If a terrorist is planning an attack, they must have copied the keys. Aware about the threat, Gibbs checks the armoury while Todd protects the President. The armoury is open, and a journalist is trying to get to the President's quarters in an attempt to kill him. Gibbs confronts the journalist, who attacks back, but is killed before any damage is done.

At the end of the episode, Agent Todd resigns from the Secret Service for good because of her relationship with Major Kerry. Then she is recruited by Gibbs as an NCIS agent.