Season 9, Episode 1 Nature of the Beast
First Aired: September 20, 2011
In the ninth-season opener, Tony's secret assignment for the SECNAV leads to an NCIS agent's death and leaves Tony and Gibbs to solve the mystery of how the tragedy occurred.
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- Premiered: September 23, 2003
- Rating: TV-14
- Premise: A successful "JAG" spin-off about criminal cases involving Navy and Marine personnel, handled by the Naval Criminal Investigative Service. For the second season, the series title was shortened from "Navy NCIS" to "NCIS." (more)
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Agent Gibbs (Mark Harmon) has a lot of rules – some are actually useful in real life.