| Credited cast: |
 | Milos Kopecký | - | Lord Henry Chelford |
 | Petr Stepánek | - | Richard Chelford aka Hubert "Rosen-Hubert" |
 | Zlata Adamovská | - | Jane Harper |
 | Jirí Kodet | - | Arthur Harper (as Jiøí Kodet) |
 | Jan Faltýnek | - | Sergant Putler |
 | Stella Zázvorková | - | Mrs. Taylor (as Stela Zázvorková) |
 | Václav Mares | - | John Gilder aka Mr. Brown |
 | Regina Rázlová | - | Mary Brown |
 | Oldrich Vízner | - | Dr. Freeman (as Oldøich Vízner) |
 | Karel Effa | - | Butler Jonathan |
 | Lubomír Kostelka | - | Diener Thomas |
| Rest of cast listed alphabetically: |
 | Erich Breese | - | Diener Thomas (voice) |
| Thomas Hailer | - | Dr. Freeman (voice) |
| Hans-Joachim Hanisch | - | Lord Henry Chelford (voice) |
| Hans Ulrich Laufer | - | Butler Jonathan (voice) |
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