So, this week's episode - original use of a single set and limited cast, or a bit ****? I really can't decide. Although it was nice to have an implicit 'monster' for a change, and the lack of running around screaming was a welcome change of pace, I think you need more than 12 people standing around shouting at one another for 45 minutes to make a great episode.
I will say this: it was better than I've come to expect from Russell T Davies, and the absense of Donna was a bonus. Neither of these things is saying much.