As evidence for the defense at his ongoing trial, the Doctor presents an adventure from his future when he is travelling with a computer programmer named Mel. Answering a mysterious distress call from the space liner Hyperion III, they find that the passengers aboard include unscrupulous scientists, secret agents, saboteurs, thieves and a murderer. And lurking in the shadows are the Vervoids, the product of sinister botanical experiments, who will stop at nothing to destroy all non-plant life.
Genres:
Colin Baker as The Doctor
Bonnie Langford as Mel Bush
Michael Jayston as The Valeyard
Lynda Bellingham as The Inquisitor
Honor Blackman as Professor Sarah Lasky
Michael Craig as Commodore Travers
Denys Hawthorne as Rudge
Yolande Palfrey as Janet
Malcolm Tierney as Doland
David Allister as Bruchner
Tony Scoggo as Grenville
Arthur Hewlett as Kimber
Simon Slater as Edwardes
Sam Howard as Atza
Leon Davis as Ortezo
Hugh Beverton as First Guard
Barbara Ward as Mutant / Ruth Baxter
Mike Mungarvan as Duty Officer
Martin Weedon as Second Guard
Peppi Borza as First Vervoid
Bob Appleby as Second Vervoid
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