MASTER: If we do cooperate, there'll be no question of you ever returning to Gallifrey.

DOCTOR: If we don't cooperate, there'll be no question of Gallifrey.

ADRIC: The Earth people use it to beam messages to the stars. The Doctor calls it reiterated invitation to alien intelligences in deep space.

NYSSA: And that's us.

DOCTOR: It's the end. But the moment has been prepared for.