"I rather fancy that's settled that little bit of solution."

OK, that's Billy going way off piste again but six-part saga The Sensorites is all about solutions.

A remarkably serene Susan is the solution to an impasse on a spaceship, the devious Doctor finds the solution to a municipal malaise and the unlucky Ian drinks a solution which may well have previously passed through half a dozen Sensorites.

These frisbee-footed, central-hearted denizens of the Sense-Sphere are a strange bunch. Even without eyelids, they seem blinkered to everything that's going on. And, ill-equipped as they are for darkness, noise and identity parades, they're hardly the stuff of nightmares, so the late arrival of some subterranean soap-dodgers brings some welcome menace to proceedings.

So is this story as soporific as fan wisdom would have you believe? Well pack some fruit and (clean) water, strap yourselves in and prepare for the long haul and as Jim and Martin slowly sense the solution to that question.