The notes I took while listening to this episode were very brief, and said, simply: it was fine. And I think, writing this up a few weeks later, that is my enduring memory. It was fine. I haven't listened to any of the UNIT stories with Klein in, though I don't feel I missed any context.

The Doctor meets again with Klein, now safely in her job at UNIT, and her assistant, Will Arrowsmith. And poor Will... well. He's annoying. I haven't felt this irritated at a reccuring character since Thomas Brewster, and even though I wanted to like Will, he's just grating. He feels like a proto-Osgood, in some ways, but without any of the charm.

But enough griping. What else is there to say? Writing this after listening to the full trilogy, it's very obvious that the whole point of this episode is to be a prequel to what's to come, setting up the Persuasion Machine as an evil device to control the universe, and the characters. And so, in that sense, it is successful. But as a story? Well, it's fine.