PERI: Chip ID: 11KMF10.

INTERCOM: Chip ID: 11KMF10. Subs: 127. Inadequate. Request denied.

DOCTOR: Ah, I suppose I’ll have to do it after all—but under protest. I have been designated ID 11AHF05.

INTERCOM: ID: 11AHF05. Subs: zero. Request denied.

DOCTOR: Zero? Subs zero? Peri’s already got 127.

PERI: Don’t worry, Doctor, I’ll subscribe to you. Uh, 11AHF05 sub.

DOCTOR: Oh, so now I have one sub. ONE. Ridiculous.

DOCTOR: Come along Peri. (few seconds later) Peri.

PERI: Sorry, I got distracted. Look at this shop—Peri Beauty! (laughs) Named after me, of course.

DOCTOR: I suspect it’s named after the peri, a beautiful fairy in Persian mythology—

PERI: Who before it was good, was evil. Yeah. I think someone mentioned that to me once?