The Liberator reaches Space City where Blake seeks the assistance of the Terra Nostra, a criminal group who control the deadly drug Shadow. Blake must find out what the link with the Federation is, and why Orac is telepathically torturing Cally. The key appears to be the planet Zonda.
Elenco: Michael Keating , Paul Darrow , Peter Tuddenham , Jan Chappell , Josette Simon , Sally Knyvette , Gareth Thomas , Steven Pacey , David Jackson , Glynis Barber .