Abby Sciuto is a key character on NCIS. She's played by Pauley Perrette, who will also appear on NCIS: Los Angeles in the fall of 2009.
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Gibbs is very much in charge of the NCIS team. He also has a boat, which often plays a role on the series.
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Pauley Perrette plays Abby on NCIS. She'll crossover and appear on an episode of NCIS: Los Angeles in September 2009.
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Gibbs must make all the tough decisions on NCIS. This character is played perfectly by Mark Harmon.
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Leon Vance is the director of NCIS. He's also now in charge at NCIS: Los Angeles.
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Cote de Pablo plays a key role on NCIS. She'll be returning as Ziva for the show's seventh season.
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Ziva David plays a key role on NCIS. Her and Tony share a lot of history together.
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Tony DiNozzo is a member of the NCIS team. He's a former homicide detective.
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On the sixth season finale of NCIS, Gibbs had a few difficult decisions to make. None was more pressing than the one that focused on Ziva.
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Merik Tadros and Cote de Pablo are seen here in a shot from the sixth season of NCIS. They play Michael Rivkin and Ziva, respectfully.
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Gibbs and the team arrive in Israel for the sixth season finale of NCIS. They run into Ziva's father there.
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Tony (played by Michael Weatherly) and the team find their investigation leads to a familiar foe in the NCIS episode "Semper Fidelis." Here's a picture from the installment.
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NCIS Quotes

I am an NCIS special agent. My duty is to serve and protect the United States, and our Navy and Marine Corps across global boundaries. I recognize my badge as a symbol of authority and public trust. I will live my life above reproach, understanding my actions reflect upon my fellow special agents, and our agency.

Tony

Tali: Eema.
Tony Senior: What does that mean? Eema?
Tony: Hebrew. Means mother, mom.
Tali: [pointing at Tony in photo] Abba.
Tony: Tali, what did you say?
Tali: [points at Ziva] Eema. [points at Tony] Abba.
Tony: Abba?
Tony Senior: Daddy.
Tony: Ziva must have told her. She knows me. That's right, Tali.