There was more holes than plot!

It would have been more logical to blow up the alien and Ianto got caught in the crossfire. Not that I'd like to think up of ways to kill off character's I like.

Rose:...Can’t we just launch a nuclear bomb at them?
Harriet Jones: You’re a very violent young woman.

The whole aliens getting high on human children was pretty sick and RTD couldn't think of a better way of resolving the threat?!!!