The NCIS team jumps into motion to investigate who is responsible for a potential bioterror attack at a strip mall parking garage; Knight's father deals with a health scare while in Japan.
Tropes:
- Chekhov's Gunman: Nate Billings, one of the victims of the botched gas attack, is actually a Russian sleeper agent who was behind the episode's events.
- Clueless Chick-Magnet: Parker finds himself the object of interest of U.S. Senator Constance Miller, much to his awkward surprise.
- Connected All Along: It turns out the Russian sleeper spies that NCIS has arrested in Higher Education and Bridges were active volunteers in U.S. Senator Constance Miller's last reelection campaign. What their interest in Senator Miller is not known...
- I Have Your Father: Dorothy has been coerced to steal Senator Miller's hard drive after her father Phillip Legrand has been kidnapped by Russian sleeper agent Nate Billings.
- Wham Episode: The episode reveals Season 20's story arc revolving around U.S. Senator Constance Miller and Russian sleeper spies.
- You Have Outlived Your Usefulness: Attempted by Nate Billings on Dorothy and her father after retrieving Senator Miller's hard drive. Fortunately, Dorothy and NCIS are Genre Savvy to set up a trap and arrest him.
