The Doctor: There's a way out.
The Doctor: There's always been a way out.
Rose: Why don't we use it?
The Doctor: (into the teleconference set) Because I can't guarantee your daughter will be safe.
Jackie: (on phone) Don't you dare! Whatever it is, don't you dare!
The Doctor: That's the thing. If I don't dare, everyone dies.
Rose: Do it.
The Doctor: You don't even know what it is. You'd just let me?
Jackie: (on phone) Please, Doctor. Please. She's my daughter. She's just a kid.
The Doctor: Do you think I don't know that? Cos this is my life, Jackie. It's not fun, it's not smart. It's just standing up and making a decision because nobody else will.
Rose: Then what are you waiting for?
The Doctor: I could save the world but lose you.
(pause; the Doctor and Rose look at each other; Harriet steps forward)
Harriet Jones: Except it's not your decision, Doctor. It's mine.
Jackie: (on phone) And who the hell are you?
Harriet Jones: Harriet Jones, MP for Flydale North. The only elected representative in this room, chosen by the people, for the people, and on behalf of the people, I command you. Do it.