David McCallum credited as playing...
Donald Mallard
- Abby Sciuto: I can see a kindred spirit in you. I mean, not that I can see your spirit, cause that would be weird. I guess not too weird becasue you're in here and you're... you know, you're -
- [Abby clears her throat]
- Abby Sciuto: Um anyway, so what I'm trying to say is-is we communicate in the same way. I could tell the first time I saw all this. Everyone else saw chaos and I-I saw patterns right away. There were patterns in the chaos... So I... just wanted you to know that whatever it is... that you're trying to tell me, I promise you, I promise I'll understand.
- Dr. Donald Mallard: Careful. Sometimes they talk back.
- Dr. Donald Mallard: There's no doubt that Abby greatly identifies with the lieutenant. Has done from the beginning.
- Special Agent Jethro Gibbs: A slippery slope, Duck.
- Dr. Donald Mallard: Well, as Nietzsche says: "When you gaze long into the abyss, the abyss will gaze into you."