I enjoyed this more than I was expecting. Nyssa can be hard to write for, as her role in the TV series was often little more than eye candy or a calm voice to contrast with outbursts from Tegan, Turlough, or Adric. I'm also not generally a fan of second-person narrative, which can feel like the author is telling the reader what to think. In this story, however, Nyssa's passivity and optimism work well with the psychological nature of the challenge, and the use of second-person is cleverly justified by the end of the tale.

There's an alien threat. It's Doctor Who, so the presence of some sort of alien is not really a spoiler. However, while listening to the story, I kept wondering whether the alien threat was really necessary. Either way, this was a pleasant listen.