Wargrave
Marenkov
Elsa Lang
Colonel Nikolai Bunin
Leroy
Scholten (as Horst Bucholz)
Haller
Molinari
Helga Mann
Geiger
Muehler (as Günter Meissner)
Olga (as Sylvia Langova)
Sedov
Zannbin (as Vladets Shebal)
Neckerman
Philip John (as Sky Dumont)
Prachko
Commissar (Maxim Gorky)
Alfredo
Bernardo
1st Policeman
2nd Policeman
Dutch Customs Man (as Hans Jürgen Luethen)
Swiss Officer
Adjutant of Molinari (as Guido Hoegel)
1st Signal Man
2nd Signal Man (as Erland Erlandson)
Engineer
Security Agent
Gen. Marenkov (voice) (uncredited)