One thing that I disliked intensely was the cavalier disposal of the lady dinosaur. It was a cute idea, having the Doctor make his entrance like that. But then the writers were faced with the problem of this enormous dinosaur in London. The Doctor yells at her that he's going to save her, he's going to return her to where she belongs...and five seconds later she's killed. Why? She was an encumbrance to the plot, not because the cyborgs needed her. So if something gets in the way of the story, just kill it? That's the worst kind of hack writing.