When the TARDIS materialises inside a rocket, the Doctor and Jamie are alarmed by the presence of a hostile Servo-Robot. They discover that the rocket is drifting in the orbit of a giant space station - the Wheel in Space.

Once inside the magnificent spaceship they are bewildered by its complexity and sheer size. The technicians and programmers are highly trained, but who are they working for?

Suspecting the worst, the Doctor is still horrified to find the deadly Cybermen in control. What evil plan are they plotting? Who or what are the Cybermats? Can the Doctor trust anyone on board to help him stop the Wheel as it spins relentlessly through space?

David Troughton, who played several roles in the BBC TV series, reads Terrance Dicks's novelisation of a 1968 serial by David Whitaker - with authentic Cyber voices by Nicholas Briggs.

(P) 2021 BBC Studios Distribution Ltd
Cover illustration by Ian Burgess
Reading produced by Neil Gardner
Sound design by Simon Power
Executive producer: Michael Stevens