DOCTOR: Harry, were you trying to undo this?

HARRY: Well, naturally.

DOCTOR: Did you make the rocks fall, Harry?

HARRY: Er, well, I suppose I must have done, yes.

(The Doctor laughs.)

DOCTOR: Harry Sullivan is an imbecile!

LEADER: The heart of Voga is almost pure gold. Gold is hostile to our function, therefore Kellman was asked to preserve three animal organisms for this purpose.

DOCTOR: Isn't it wonderful to feel needed, Commander?