I take it you were viewing in England or Wales ? sadly the ending was cut if you viewed it there but other areas where fine. Heres the last roughly 5 minutes of the show from the Doctor Who Wiki
All the survivors are now gathered below the wreckage of the Byzantium, with no way out. Bob radios again, and tells the Doctor that the Doctor lied to him. Bob tells the Doctor that he thought his fear would save him, like the Doctor said, but Bob died afraid and alone anyway. This is all in an attempt to get the Doctor angry, but it doesn't work. The Doctor asks if the group trusts him (they do or rather all but Father Octavian as he states that he has "faith"), and then for Octavian's sidearm, and tells Bob that the Angel's made one mistake in the trap. Bob asks what they shouldn't have put in the trap, and the Doctor answers "me" and he shoots the gravity globe illuminating the chamber and the episode ends as a cliffhanger.