Режиссер: Alan Gibson
Andrew Ray
Klaus Fuchs
Michael Craig
Bruno Pontecorvo
Ray Smith
Doctor Cockcroft
Peter Jeffrey
Major Phillips
John Franklyn-Robbins
Skardon
Edward Wilson
Alan Nunn May
Antony Carrick
Commander Burt
Sandra Payne
Marianne Pontecorvo
Victoria Fairbrother
Betty
