An acid trip of a story that is a better version of The Celestial Toymaker. The serial clips along at a decent pace. The variety of sets, and situations, make this a very engaging story. The imagination of the writers is poured into every aspect of the story. The costuming is excellent, and the set design is top-notch too.

Also, this one gets bonus points for the famous shot of Wendy Padbury hanging onto the TARDIS console.