The TARDIS materialises on board a dark and silent spaceship. As the physician, Susan, Ian and Barbara penetrate the craft’s eerie gloom they come across what seem to be the bodies of two deceased astronauts. However the astronauts are far from dead, and are surviving in mortal concern with the Sensorites, a competition of telepathic animals from the Sense-Sphere. When the lock of the TARDIS can be stolen the Doctor can be pressured into an uneasy alliance with the aliens. And when he happens over the Sensorites’ planet he discovers that it’s not merely the Humans who’ve cause to be scared… William Russell, who played the Doctor’s companion Ian in the original TV serial, reads Nigel Robinson’s full and unabridged novelisation, first published by Target Books in 1987.