I've just listened to the three episodes back to back and really enjoyed them - the first two especially as I love any story which explores the Tardis, and this one did it brilliantly. The Glass Control Room was a particularly lovely idea, and sound wise was carried off perfectly. The third episode was still great, but I could have happily listened to all four episodes set in the Tardis - though that's a personal preference, obviously, and it nicely explained exactly what the hell was going on - well, at least most of it.

Performances wise everyone was superb but Paul especially turned in a great turn as a wearier and more worried Doctor than we've seen him recently, and Dave's darker, menacing tone was all very disturbing. My only mini-complaint is that Rob seemed a bit cartoony at times (Sorry Steve!) but bar that it's been a fantastic listen, and I can't wait to hear the final part of the story.