Forum:The Next doctor...why miss hartigan?

In The Next Doctor why was it necessary to use Miss Hartigan for the cyberking? I know they needed her to gain access to the children(even the need for children to do the work is questionable) but surely there were many high ranking cybermen that were more suitable candidates.

She was full of anger and hate, and therefore would be a good Cyb erman. I'm A Hydroponic Tomato! Bigredrabbit 05:25, December 23, 2009 (UTC)