Title from container

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, a former Marine whose skills as an investigator are unmatched, this highly trained, tight-knit team travels the world investigating murder, espionage, and terrorism

Originally broadcast on television during the 2006-2007 season

Contains all 24 episodes from the fourth season

Some episodes may be edited from their original network versions

Special features: Disc two: Cast roundtable (part 1) ; Disc three: "Twisted sister" commentary by Sean Murray and Terrence O'Hara; cast roundtable (part 2) ; Disc four: "Dead man walking" commentary by Sean Murray and Cote de Pablo; Ducky's world; Behind the set: the production design of N.C.I.S. ; Disc five: "Skeletons" commentary by Brian Dietzen and David McCallum; "Grace period" commentary by Michael Weatherly; "Cover story" commentary by Michael Weatherly and Pauley Perrette; Dressed to kill: dressing the sets of N.C.I.S.; prop master ; Disc six: "Angel of death" commentary by Donald P. Bellisario; Picture perfect: the looks of N.C.I.S.; Season of secrets

Mark Harmon, Michael Weatherly, Cote de Pablo, Pauley Perrette, Sean Murray, Lauren Holly

Not rated

DVD, region 1, widescreen (16:9 enhanced) presentation; Dolby Digital 5.1 surround, Dolby Digital stereo. surround, NTSC

Closed-captioned

Disc one: Shalom -- Escaped -- Singled out -- Faking it. Disc two: Dead and unburied -- Witch hunt -- Sandblast -- Once a hero. Disc three: Twisted sister -- Smoked -- Driven -- Suspicion. Disc four: Sharif returns -- Blowback -- Friends & lovers -- Dead man walking. Disc five: Skeletons -- Iceman -- Grace period -- Cover story. Disc six: Brothers in arms -- In the dark -- Trojan horse -- Angel of death