K9: Couldn't have put it better myself, Master.
The Doctor: I don't think you could.
K9: Agreed. Possibility of your explanation being better than mine, less than 1%.
The Doctor: What? You are the most insufferably arrogant, overbearing, patronizing, beantip…
The Doctor: Nothing. Someone once said that to me once.
K9: Correction, Master. Several people have said that about you.
The Doctor: Thank you. Thanks you very much.
K9: Thanks are not necessary.
The Doctor: At least no one has ever called me smug.