My review of the previous episode: Empress of Mars.
SCOTLAND!
It's been a while since we've visited the home of the Twelfth Doctor's accent. With all the kilts and accents, it makes me nostalgic for Jamie McCrimmon and Amy Pond, and now I'm wondering what this story would have been like with an all-Scottish TARDIS team. I mean, it's still okay. It's even good. Honestly, it's probably one of the better episode this season, after the disappointment that was the Monks trilogy.
Also, a fun fact: this episode was written by Classic Who writer Rona Munro, who wrote the final episode before the show was cancelled.