My theory, Doctor Who will totally beat the Daleks and the Cybermen, with only a sonic screwdriver, so that they can never come back again.
Then they will come back and appear in a later episode.
I want new baddies not old ones continually returning again and again.
Also, I missed this episode on Saturday (together with the last 15 mins of the England match :x ) but we ended up in Tesco while Doctor Who was on. Tesco spoiled that whole episode for me with their stupid policy of "lets show T.V. on the T.V.'s"