Just some quick, non-spoilery thought's on this week's new episode Thin Ice: I loved the interplay between the Doctor and Bill, and especially the Doctor's playfulness as he acclimated his new companion to time travel. There is a nice reference to The Butterfly Effect from Ray Bradbury's A Sound of Thunder (what happened to poor Pete, indeed?). Some of the accents were a bit too thick for my poor American ears to catch the first (or even second) time around, but the interplay was clear enough it didn't really matter. On the whole I thought it was a fun episode, perhaps not stellar but certainly better than most of Capaldi's first season. My only big complaint is that there was a particularly dodgy effect at the climax of the story, bad enough to detract from the story. It wasn't quite as bad as the CGI in The Lazarus Experiment, but it wasn't much better either. I expect more from the current production team and budget.