A body-swap between the master and the doctor where neither of our main characters give themselves away to the familiar supporting cast, meaning you get some nice, subtle interactions from characters (Jo and UNIT personnel) noticing differences between the two.

Plot-wise I have no criticism, it’s all deftly done. I did feel Jo was written in a sexist way though. I never quite got comfortable with her portrayal here. A rare case of male gaze in audio.