While watching for a planet that may collide with earth, scientists stationed in Scotland are approached by a visitor from outer space.
Robert Clarke
John Lawrence
Margaret Field
Enid Elliot
Raymond Bond
Prof. Elliot
William Schallert
Dr. Mears
Roy Engel
Tommy the Constable
David Ormont
Inspector Porter
Gilbert Fallman
Dr. Robert Blane
Pat Goldin
The Man from Planet X
Tom Daly
Donal, a searcher
June Jeffery
Wife of Missing Man
