BARBARA: I can’t resist it, Doctor! She is telling me what to do! I must... destroy the override controls!

DOCTOR: Nonononono, Barbara! You are your own woman! And you can make your own choices!

BARBARA: Ch-choices?

DOCTOR: Choices! You love choices, don’t you, Barbara! Of course you do! You’re a vending machine. You offer people choices all the time! That’s what you do! Crisps or pop? Milk or dark chocolate? Diet or full fat? That’s what you’re all about! Choices!