DOCTOR: Look, three options. One, I let the Star Whale continue in unendurable agony for hundreds more years. Two, I kill everyone on this ship. Three, I murder a beautiful, innocent creature as painlessly as I can. And then I find a new name, because I won't be the Doctor any more.

LIZ: There must be something we can do, some other way.

DOCTOR: Nobody talk to me. Nobody human has anything to say to me today!