Kadro (12)
Kenneth MoreWilliam Blood
Shirley Anne FieldPolly
Norman BirdHerbert
Michael HordernDr. Davidson
John Glyn-JonesDr. Wilmot
Charles GrayLeo
Bernard HorsfallRex
Bruce BoaRoy
Noel PurcellProsecutor
Ed DevereauxStorekeeper
John PhillipsProfessor Stephens
Edward BurnhamTest Chamber Scientist