ALPHA: Doctor?

DOCTOR: Alpha Centauri.

ALPHA: It is! It's the Doctor!

DOCTOR: Alpha Centauri, my dear fellow, what a very well-timed entrance.

ALPHA: It's like a miracle, Doctor. All these years and you haven't changed a bit.

DOCTOR: Neither have you, my dear fellow. A touch of grey around the tentacles perhaps, but still the same old Alpha.