That's one of the best thing I've seen for ages, in anything. Derek Jacobi. Oh, man, I don't know what to say, best actor alive. Tennant was at his best. That scene where he's talking to Jack through the Red Window - incredible - I didn't know he could be so good. And to round it all off John Simm, making Tennant call him 'Master'. Bloody hell. I can't wait to hear what everyone thought. Bloody brilliant, what a trip.