The team investigates the murder of a seaman on NCIS. "Deja Vu" is the 13th episode of the show's 13th season.
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Abby's brother turns out to be the main suspect in a poisoning case on NCIS. "Sister City: Part 1" is the 12th episode of the show's 13th season.
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Ducky is attacked by somone who claims to have information about his deceased half-brother on NCIS. "Spinning Wheel" is the tenth episode of the show's 13th season.
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The team helps find a bone marrow match for a sailor with leukemia on NCIS. "Blood Brothers" is the tenth episode of the show's 13the season.
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Bishop and Jake's marital issues become a top of discussion on NCIS. "Day in Court" is the ninth episode of the show's 13th season.
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DiNozzo meets up with his ex-girlfriend Jeanne Benoit on NCIS. "Saviors" is the eighth episode of the show's 13th season.
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The team investigates the death of a retired Navy Lietenant, forcing Ducky to reveal his membership in a secret society that looks into cold cases on NCIS. "16 Years" is the seventh episode of the show's 13th season.
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The team must figure out if the person who murdered a petty officer is a serial killer or a copycat on NCIS. "Viral" is the sixth episode of the show's 13th season.
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Abby is trapped in a pharmaceutical lab during a hostage situation on NCIS. "Lockdown" is the fifth episode of the show's 13th season.
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Vance and Gibbs team up and head back into the field on a case on NCIS. "Double Trouble" is the fourth episode of the show's 13th season.
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McGee and Bishop go undercover during a murder investigation on NCIS. "Incognito" is the third episode of the show's 13th season.
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The team gossips about Gibbs new look on NCIS. "Personal Day" is the second episode of the show's 13th season.
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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.