Rhys: Just like the old days.
Gwen: No it's not. It's worse. It only ever gets worse.

Rhys: This is different now. You've got a daughter.

Stewart: It's not me you're after. In fact I've been trying to find out the truth just as much as you. I'm not a bad man, Mr. Harkness.
Jack: Captain.
Stewart: I'm not a bad man, Captain. I'm not a good one either. I'm a middle man in every sense of the word.

Stewart: There was a document from Italy, from a source inside the Council of Ministers. A contact then-deceased. It simply referred to the Blessing. It said, "They have found The Blessing."

Stewart: What did you find?
Zheng: A dead end.
Stewart: What do you mean? What are they building?
Zheng: There's nothing there. I looked. I found nothing. Nothing at all. Goodbye, Mr. Owens. [jumps from the forty-fifth floor of a building to his death]

Triangle Voice: Mrs. Monroe. We'd like to apologize. We're really very sorry about this. Indeed we'd like to imagine if time and tides had flown in a different way, we could have almost been friends. I hope that's some consolation. At the end. Truth of it is, we liked your message, Mrs. Monroe. We liked your style. But we already have Oswald Danes. We don't need another. And certain aspects of your strategy were revealing our hand just a little too soon. And we have been planning this so carefully for such a long time. Because we are everywhere. We are always. We are no one. And soon, the families will rise.

[On an alien encountered during a past adventure]
Jack Harkness: It's a species of brainspawn treated as vermin on more than 150 planets that I know and valued as dinner on one other. It tastes like oysters.
Angelo: You didn't...?
Jack Harkness: I had to be polite.