Tennants not leaving at the end of this series! Next series though, yeah (or at least Series 4 was said in the past).
To everyone moaning about the use of 'Voodoo Child' I don't think it was meant as a soundtrack over the Masters actions,
wasn't it the Master himself who was playing the song, because didn't he say something like "that's enough of that" and turn it off?
If so it puts a different dynamic on it's use, because it's showing what a warped character the master has! How he can cause so much chaos and destruction, but have a joke with it!