NCIS: Season 6, Episode 5

6 - 5: Nine Lives

Gibbs and Fornell reluctantly join forces in a murder investigation. The FBI is prosecuting a Mafia Boss. One key witness is a Marine, a man suspected to have been involved in another murder. Evidence from moldy rope used in the two murders links the crimes to the Mafia Boss. The Marine escapes from FBI protection to seek revenge, finds the Mafia Boss and shoots and kills him as Gibbs and Fornell try to stop him. Meanwhile Ziva plans for a vacation in Tel Aviv and Tony snoops around and finds a picture of a shirtless man on Ziva's desk (Ziva's partner with Mossad, although Tony does not know this), piquing his interest.