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- Season 9 overviewSep 20, 2011-May 15, 201224 episodesSeason 9 episodes24. Till Death Do Us Part May 15, 2012
- Shaken by terrorism, the NCIS faces devastating surprises; the case impacts Jimmy Palmer's wedding.
- 23. Up in Smoke May 8, 2012
- During a search for a terrorist targeting the Navy, a bug is found in a probationary agent's tooth.
- 22. Playing With Fire May 1, 2012
- A fire on a Navy vessel leads to a discovery that elevates security at Navy facilities worldwide.
- 21. Rekindled Apr 17, 2012
- The team works with the Baltimore police to investigate a fire that revealed missing Navy documents.
- 20. The Missionary Position Apr 10, 2012
- Tony helps Ziva and her mentor look for a missing Marine lieutenant in Colombia.
- 19. The Good Son Mar 27, 2012
- The investigation into a petty officer's murder leads the team to Director Vance's brother-in-law.
- 18. The Tell Mar 20, 2012
- The Secretary of the Navy, Gibbs and Dr. Ryan investigate when classified information is leaked.
- 17. Need to Know Feb 28, 2012
- Security at a laboratory is put in jeopardy when an officer's murder is linked to an arms dealer.
- 16. Psych Out Feb 21, 2012
- A Navy reservist is found dead from a suspected suicide; DiNozzo sees McGee's paycheck.
- 15. Secrets Feb 14, 2012
- A dead Navy captain dressed in a costume underneath his uniform leads the team to a secret society.
- 14. Life Before His Eyes Feb 7, 2012
- Gibbs questions the choices he has made in his life when a man pulls a gun on him at a diner.
- 13. A Desperate Man Jan 10, 2012
- NCIS investigates the death of a Navy lieutenant whose body was found at a construction site.
- 12. Housekeeping Jan 3, 2012
- The investigation of a Navy commander's murder leads the team to E.J. Barrett.
- 11. Newborn King Dec 13, 2011
- When a Navy captain is killed, the team must find and protect his pregnant companion.
- 10. Sins of the Father Nov 22, 2011
- Anthony DiNozzo Sr. is found in a car with no memory of the previous night and a body in the trunk.
- 9. Engaged, Part 2 Nov 15, 2011
- Ziva and Gibbs head to a missing Marine's last-known whereabouts in Afghanistan.
- 8. Engaged, Part 1 Nov 8, 2011
- The team finds a problem with the DNA samples collected from a military plane crash.
- 7. Devil's Triangle Nov 1, 2011
- The team looks for answers when the current husband of Gibbs' and Fornell's ex-wife is abducted.
- 6. Thirst Oct 25, 2011
- Evidence reveals that a lieutenant was killed by being force-fed too much liquid.
- 5. Safe Harbor Oct 18, 2011
- The team searches a cargo vessel for a killer after a coast guard officer is gunned down.
- 4. Enemy on the Hill Oct 11, 2011
- A contract killer targets a Navy lieutenant commander; information about Abby's family emerges.
- 3. The Penelope Papers Oct 4, 2011
- NCIS discovers a connection between McGee's grandmother and the murder of a Navy lieutenant.
- 2. Restless Sep 27, 2011
- After a beloved Marine is fatally stabbed, the team makes a surprising discovery about his past.
- 1. Nature of the Beast Sep 20, 2011
- After months of tracking his target, Tony needs Gibbs to help him find answers.