Overview

The Doctor and Romana learn the second segment of the Key to Time is on the planet Calufrax. Yet they arrive on a planet called Zanak, which has been hollowed out and fitted with hyperspace engines, allowing its insane, half-robot Captain to materialise it around smaller planets and plunder their resources.

Details

Cast

Tom Baker

Mary Tamm

John Leeson

Bruce Purchase

Andrew Robertson

Rosalind Lloyd

David Warwick

David Sibley

Ralph Michael

Primi Townsend