NCIS: THE FOURTH SEASON the top-rated investigative crime drama, continues the thrilling adventures of a cutting-edge crew of special agents who operate outside the government's chain of command. Led by Leroy Jethro Gibbs (Mark Harmon), a former Marine whose skills as an investigator are unmatched, this highly trained, tight-knit team travels the world investigating murder, espionage and terrorism. This 6-disc set includes all 24 action-packed episodes, along with top-notch, behind-the-scenes special features, from this critically acclaimed, one-of-a-kind series. Episode Listing: Shalom Escaped Singled Out Faking It Dead and Unburied Witch Hunt Sandblast Once a Hero Twisted Sister Smoked Driven Suspicion Sharif Returns Blowback Friends & Lovers Dead Man Walking Skeletons Iceman Grace Period Cover Story Brothers In Arms In the Dark Trojan Horse Angel of Death Special Features: Cast Roundtable - Part 1 Cast Roundtable - Part 2 Ducky's World Behind The Set: The Production Design of NCIS Dressed To Kill: Dressing the Sets of NCIS The Prop Master Picture Perfect: The Looks of NCIS The Season of Secrets