Ducky and Jimmy in a photo from "Namesake." The fifth episode of NCIS Season 10 airs October 30, 2012.
David McCallum as Ducky on NCIS. "Phoenix" airs October 9, 2012.
Ducky takes the lead in a new case on NCIS. "Phoenix" airs October 9, 2012.
Gibbs in the basement on NCIS. What do you think he could be building down there?
Ducky walks on the beach in the closing moments of the NCIS Season 9 finale.
Ducky and Tony in the Season 9 finale of NCIS.
Drs. Mallard and Ryan on the Season 9 finale of NCIS.
Ducky, Abby and Gibbs in the penultimate episode of NCIS' ninth season. "Up in Smoke" airs May 8, 2012.

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.

McGee: Rule number 70 - keep digging till you hit bottom.
Abby: McGee! There is no rule 70.
McGee: Well, I--
Abby: You just made up a rule. This McGibbs thing has really gone to your head. I don't even recognize you right now.