Continuity: When the Nitro-9 explodes against the wall, it is clearly intact. A shot later, it has been reduced to rubble.
Revealing Mistake: When Ace is being attacked by the haemovores, she hits one in the head, causing his mask to move back and expose his neck.
Trivia: When the Doctor drives the haemovores back with his faith, he is reciting the names of his companions.
Ace: If you want a job done properly, let a girl do it.
Perkins: Sir, radio transmissions disabled as ordered, sir!
the Doctor: Splendid work, Perkins. Splendid work! Now put it back together again.
Ace: We can release Captain Sorin to help us. I can distract the guard.
The Doctor: How?
Ace: Professor. I'm not a little girl.
Sorin: I believe in the Revolution.
The Doctor: Complete faith? No doubts?
Sorin: Doctor. If we meet again, then you will have you answer.
Dr. Judson/Fenric: We play the contest again... Time Lord.