NCIS Season 9 Episode 4 – NCIS s09e04 Enemy on the Hill, 904, 9x04, – Free TV – Stream – Summary: Special Agent Leroy Jethro Gibbs, an intelligent, highly skilled investigator, leads a team of of special agents at the Naval Criminal Investigative Service (NCIS), whose mission is to investigate any crime that has a shred of evidence connected to Navy and Marine Corps personnel, regardless of rank or position..........., Gibbs and the NCIS team have to find answers regarding Tony's months-long assignment when an NCIS agent is found dead....., When the Port-to-Port killer is finally revealed, the entire NCIS team finds themselves in grave danger..........., NCIS s09e04, Show airs on: Tue Oct 11, 2011, So don't forget to watch on CBS at 9:00 pm.