Season four continues the adventures of a cutting-edge crew of special agents who operate outside the government's chain of command. Led by Leroy Jethro Gibbs, this highly trained, tight-knit team travels the world investigating murder, espionage, and terrorism.

Title from container. Originally broadcast on television during the 2006-2007 season. "Some episodes may be edited from their original network versions"--Container. "CBS DVD"--Container. Widescreen.

Disc 1. Shalom -- Escaped -- singled out -- Faking it -- Disc 2. Dead and unburied -- Witch hunt -- Sandblast -- Once a hero -- Disc 3. Twisted sister -- Smoked -- Driven -- Suspician -- Disc 4. Sharif returns -- blowback -- Friends & lovers -- Dead man walking -- Disc 5. Skeletons -- Iceman -- Grace period -- Cover story -- Disc 6. Brothers in arms -- In the dark -- Trojan horse -- Angel of death.