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.

Reparto

Clive Endersby

Mark Annuncio

John Meillon

Dr. Sheffield

Bill Nagy

Capt. Follenbee

David Knight

Cinam

Burt Kwouk

Novee

Roger Croucher

Fawkes

Tenniel Evans

Rodriguez

David Sumner

Vernadsky

Peter Diamond

First Crewman

John McArdle

Second Crewman

Keith Peacock

Crewman

Tim Condren

Crewman