DOCTOR: (pained) Something's happening. Something's happening. Something's happening.

GRACE: Okay. Okay. Okay. Oh my god. Oh my god. Oh my god!

(The Doctor pants and wheezes, then stops abruptly.)

DOCTOR: I know who I am!

GRACE: Oh! (laughs)

(The Doctor kisses Grace passionately as both laugh.)

DOCTOR: I... am... the Doctor!

GRACE: Good! (beat) Now do that again.