Just to answer some questions from previous thread & this:
Aitch - no, there are two more episodes. 12 and 13.
forget who asked - RTD writes about half the episodes each series. He's writing all of this final three-parter.
jenk1 - RTD is Russell T Davies, chief writer and exec. producer. The T doesn't stand for anythig, much like the S in Harry S Truman. He uses it to distinguish himself from the other Russell Davies who sometimes appears on R4.
SueBaroo - it was Delgado, from "The Daemons". "And you will give me that power!" And I think there was an Anthony Ainley chuckle when he was looking at the watch.