A fun little two parter, which classic should of done more of tbh. Very similar to new who's Unicorn and the Wasp, a murder mystery set in the 1920s, the killer being the son of the lady of the house, but he's not an alien in this story, just a deformed human. This is probably Sarah Sutton's best performance as she's usually quite boring as Nyssa, but here she gets to play a character that's more alive and emotional. That's also always a fun part of a story too, when we have a doppelganger of one of the main cast. Overall, an easy good watch.