Having been "persuaded" by a junk-mail robot, the Doctor and Ace go to visit the cirus on the planet Segonax. After two brushes with death, courtesy of dangerous robots, they arrive to find all is not as innocent as it seems.
This is Dr Who as it should be made. There are no mentions of other adventures, no reliance on the series past. Instead we have a self-contained entertaining story which constantly surprises and wrong-foots us by throwing in a variety of characters, from a 2000 AD-ish Nord the Vandal to an apparently harmless old ex-public schoolboy explorer. The hearse drawing up and lowering its window to reveal an undertaker with a painted clown's face has to be one of the most strikingly surreal moments in the history of the series. In fact this story is filled with haunting images, from the kites which are actually spying equipment to the Gods and their stone amphitheatre.
There are plenty of strong characters, and every one is there for a reason. The family commenting on the action (who in a way pre-date the X Factor), the production team who work unceasingly despite increasing pressure, the anal retentive 'big fan' who is convinced the recent shows are shadows of their former selves despite never having seen its earlier days. It's tempting to think the terrifying Stallslady (with her open contempt for the circus) was inspired by Mary Whitehouse. But I digress.
The Chief Clown is a memorable villain who I'm sure will strike a chord with anyone who, as a child, wondered what was behind those painted-on smiles. Mags is played just right, comes across as both a victim of circumstances and a repressed monster. Witness the scenes of genuine emotion - Ace trying to put on a brave face in wishing Bell Boy all the best, knowing full well what he's going to do to himself. It all looks and sounds great thanks to strong directing, imaginative design and an atmospheric soundtrack. Sylvester McCoy shows how good a Doctor he can be when given the right material. He manages to be eccentric, sympathetic, intriguing and at times even slightly sinister himself. The only trajedy of the McCoy era is that it was so short. Given imaginative, inventive tales like this one it had real potential.