Ep 7. The Silo

In NCIS: Los Angeles season 9 episode 7, titled "The Silo," the team investigates a complex case involving a potential sleeper cell in the United States. When a Russian nuclear engineer, who has been missing for 16 years, suddenly resurfaces and contacts his daughter in Los Angeles, the team must race against time to uncover his true intentions and prevent a catastrophic attack.

As the NCIS agents begin their investigation, they find themselves working with Russian intelligence officer, Arkady Kolcheck, who has a personal interest in the case. The team quickly learns that the missing engineer was involved in the development of a secret nuclear silo, leading them to suspect that he may have been working with a group of individuals who plan to use the technology to carry out a devastating attack.

As the team digs deeper into the case, they discover that the sleeper cell may have already been activated and is gathering materials needed to build a nuclear device. With the clock ticking down, the agents must use all their resources to track down the members of the cell and prevent them from carrying out their deadly mission.

Throughout the episode, tensions run high as the team faces numerous obstacles and setbacks in their quest to stop the attack. They must also deal with the personal toll that the case takes on them, including the emotional toll on Hetty, who finds herself struggling to come to terms with the possibility of a catastrophic event happening on her watch.

In the end, the team is able to uncover the true identity of the sleeper cell and prevent them from carrying out their plan. But not without significant risk, sacrifice, and loss along the way.

"The Silo" is a thrilling and suspenseful episode of NCIS: Los Angeles that showcases the team's ingenuity and bravery as they work to prevent a major disaster. With its complex storyline, strong character development, and intense action scenes, the episode is a standout in the ninth season of the long-running crime drama series.