The fourth season of the police procedural drama NCIS was originally broadcast between September 19, 2006, and May 22, 2007. Special Agent Leroy Jethro Gibbs left NCIS at the …

As NCIS mourns the loss of Ducky, the agents find comfort in working on one of his unfinished cases involving a woman whose father was dishonorably discharged from the Marines.

As the NCIS Director returns from a controversial European junket, and Gibbs and his agents reluctantly prepare for Homeland Security polygraph tests, tightly woven secrets among the …

NCIS: The Fourth Season, the top-rated investigate crime drama continues the thrilling adventures of a cutting-edge crew of special agents who operate outside the government's …

All 24 episodes from the fourth season of the US action drama series following the exploits of the Naval Criminal Investigation Service, led by Special Agent Jethro Gibbs (Mark Harmon).

When Jenny returns from her European trip, the entire NCIS team will be forced to take a Homeland Security polygraph test, and the deepest secrets of each agent are about to be …

Discover the cast and crew of NCIS: Season 4 on Rotten Tomatoes. See actors, directors, and more behind the scenes. Explore now!

A printable Episode Guide for Season 4: a handy overview of all of the show's episodes

Sep 19, 2006 · When Jenny returns from her European trip, the entire NCIS team will be forced to take a Homeland Security polygraph test, and the deepest secrets of each agent are about to …

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