| Actor | Role |
|---|---|
 Robert GrafDr.Klaus Fuchs | Dr.Klaus Fuchs |
 Josef MeinradWilliam J. Skardon | William J. Skardon |
 Walter RillaProfessor Paiser | Professor Paiser |
 Werner PetersCommander Stevens | Commander Stevens |
| AAlwy BeckerDiana Cunningham | Diana Cunningham |
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