DOCTOR: Wait a sec. How long ago did you crash land at Chicxulub?

TALBAK: Sixty-six million, three thousand, two hundred and seventy years ago.

(The Doctor and Frida exchanged a glance. Frida couldn’t get her head around such massive numbers, but something about them clearly made sense to the Doctor.)

DOCTOR: You must have been pulled in by the Cyberman freighter that my… that Adric was on. Your asteroid helped bring it all about.

DOCTOR: I dread to think what they’ll do if they find any crayons—do you have crayons? Or playdough, that would be even worse. The consistency always reminds me of the time I accidentally touched a Slitheen in the...