This was an excellent story in what is one of Big Finish's strongest ranges. The entire atmosphere of a weird castle all dedicated to clocks was really cool. It was a bit close to The House on the Edge of Chaos, but the story was realized expertly. The most surprising part is when it turns out to be a rare 'the Doctor fails' story with the Doctor horrified to find all the 'humans' were simply droids themselves, trapped in an eternal loop. The denouement with Mel comforting the Doctor that he saved them from torment is not something we get to see in every story.