Revealing mistake: At the end of "World War Three" there is a side shot of The Doctor leaving the TARDIS in which you can see inside, but the control room isn't visible, just the side on the police box. In "The Runaway Bride" there is a shot from the same angle, but this time the control room is visible.
Revealing mistake: The pyrotechnic mortars used in the destruction of The Family's ship are visible in the shots leading up to their detonation. As The Family run from their ship through the field, the mortars are visible against the branches behind them. Shortly afterwards, they detonate, creating the illusion that the invisible craft has exploded.