This is a fun enough if not somewhat empty audio short. It doesn't ask a lot and never really strives beyond its ambitions, but it is fun. The Doctor loses his coat on a planet with shell-based aliens. It's the sort of weirdness that works well for audio as it lets your imagination run wild.  Colin Baker nails the delivery here as he so often does with Big Finish. It's just this cute little story and that really feels like enough to me for what it is, and that's pretty good overall.