"An expedition sets out to discover what has happened to a lost colony on a distant planet. Amongst the scientists is a teenager raised to be a kind of human computer, able to make connections between different specialisms."
Clive Endersby
as Mark Annuncio
John Meillon
as Dr. Sheffield
Bill Nagy
as Capt. Follenbee
David Knight
as Cinam
Burt Kwouk
as Novee
Roger Croucher
as Fawkes
Tenniel Evans
as Rodriguez
David Sumner
as Vernadsky
Peter Diamond
as First Crewman
John McArdle
as Second Crewman
Keith Peacock
as Crewman
Tim Condren
Naomi Capon
Director
Isaac Asimov
Story
Meade Roberts
Adaptation
Irene Shubik
Producer
George Spenton-Foster
Associate Producer