The Liberator is captured by an artificial planet whose inhabitants wish to use the ship as the centerpiece of a sort of galactic museum. The crew is studied too, though they discover that after Ultraworld’s organic central brain digests all the information about them that it can, it intends to digest them physically as well to keep itself alive.
written by Trevor Hoyle
directed by Vere Lorrimer
music by Dudley Simpson
Cast: Paul Darrow (Avon), Jan Chappell (Cally), Michael Keating (Vila), Steven Pacey (Tarrant), Josette Simon (Dayna), Peter Tuddenham (Zen, Orac), Peter Richards (Ultra), Stephen Jenn (Ultra), Ian Barritt (Ultra), Ronald Govey (Relf)
Notes: Trevor Hoyle also authored several novelizations of the series, which combined and condensed the plots of several episodes in each book, aimed primarily at a younger audience.
LogBook entry by Earl Green