David McCallum credited as playing...
Donald Mallard
- [Ducky has discovered that the identity of butchered bodies are people associated with a trial he was also associated with]
- Jimmy Palmer: Are you scared, Dr. Mallard?
- Dr. Donald 'Ducky' Mallard: Madame Curie, one of the world's most brilliant thinkers, once said, "There is nothing in life to be feared, it is only to be understood." I think it safe to say that Madame Curie never set her eyes on a meat puzzle. Yes I'm scared... scared as hell.
- Dr. Donald 'Ducky' Mallard: Mother, may I present Caitlin? She works with Tony.
- [Mrs. Mallard spits at Kate]
- Dr. Donald 'Ducky' Mallard: Mother! We talked about this! Caitlin is here to protect us.
- Mrs. Victoria Mallard: Show me your knickers!
- Agent Caitlin 'Kate' Todd: Uh... ma'am?
- Mrs. Victoria Mallard: Your underwear, missy! One can always tell a woman's intention from her panties.
- Special Agent Anthony DiNozzo: That's always been my philosophy.
- Dr. Donald 'Ducky' Mallard: [Ducky introduces his corgi] Oh, that's Tyson.
- Agent Caitlin 'Kate' Todd: Because he thinks he's a boxer?
- Dr. Donald 'Ducky' Mallard: No, because he bites.