A group of nuclear scientists face a moral dilemma when they discover that, as well as making electricity, their government also wants to make nuclear bombs with their products.
Philip Guard
Robert Matthews
Jack Watling
Bill Hollies
Ursula Howells
Maureen Dartington
Terence Alexander
Maurice Crampton
Raymond Huntley
Prof. Brander
Eileen Moore
Joan Whitwell
Myrtle Reed
Doris
Carl Bernard
Mr. Wheatfield
Jack Howarth
Harry Wall
Peter Cushing
Simpson
