who plays on ncis tv show
Rocky Carroll, who plays Director Leon Vance on NCIS, appeared in five of the first thirteen episodes. He made a seventh appearance in  Hunted . Vance appeared in the season two finale and season three premiere. He made his tenth appearance during season six.
Chris O'Donnell plays the lead character, G. Callen, OSP's Special Agent in Charge, whose natural talent for undercover work is legendary. LL Cool J plays the role of Senior Field Agent Sam Hanna, a former Navy SEAL, who is fluent in Arabic and an expert on Middle Eastern culture.