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

McGee: All right. Well you should probably know that Abby and I used to date?
Bishop: Ew. Like, each other?
McGee: Yeah.
Bishop: Wait - isn't that a violation of rule 12, never date a....
McGee: It was a long time ago. After we'd broken up, one night I went to her lab. Found a scribbled piece paper; a list. Potential boyfriends had to fulfill certain conditions by a pre-arranged date or else, goodbye.
Bishop: Such as.
McGee: Things started off relatively normal: opening the door for her, flowers, putting the seat down. Then around number 8, it gets uh...
Bishop: What?
McGee: Does she know you have these?
Bishop: Does she know you have these?
McGee: Yeah she wasn't happy when she found out.
Bishop: These are all very specific.
McGee: Yeah.
Bishop: These ideas apply to you?
McGee: No those rules weren't in place when we were together. At least I don't think so.
Bishop: What's with the two month cutoff? Abby's sabotaging herself. I've seen stuff like this before. We have to talk to her.

Tony: One other question, I know you're an expert in English history. And I was just wondering, have you ever heard of Archibald Drummond, the 17th Earl of Trent?
Ducky: The Earl of Trent. No, I can't say I have. Why?
Tony: I was just wondering. Thanks.