Wilfred Mott is very happy: his granddaughter, Donna, is back home, catching up with family and gossiping about her journeys, and he has just discovered a new star and had it named after him. He takes the Tenth Doctor with...

"They need the Master's mind, Jo. And they'll stop at nothing - literally, nothing - until they have it." Adjacent to our universe, but separated from it by a barely comprehended gulf of higher dimensions, lies another slice of reality,...