Peter van Eyck
Role: Maj. Bob Anders
O.E. Hasse
Role: Prof. Larsen
Yvonne Furneaux
Role: Gilda Larsen
Walter Rilla
Role: Prof. Pohland
Ernst Schröder
Role: Chefarzt
Dieter Eppler
Role: Kaspar
Wolfgang Preiss
Role: Dr. Mabuse
Robert Beatty
Role: Col. Matson
Valéry Inkijinoff
Role: Dr. Krishna
Claudio Gora
Role: Direktor Botani / Dr. Mabuse
Gustavo Rojo
Role: Mario Monta
Massimo Pietrobon
Role: Jason Monta
Charles Fawcett
Role: Cmdr. Adams
Erich Koltschack
Role: Lutto
Feodor Chaliapin Jr.
Role: Apotheker
Leo Genn
Role: Adm. Quency
Renate Danz
Role: Mercedes (voice)
Erich Fiedler
Role: Direktor Botani (voice)
Heinz Giese
Role: Col. Matson (voice)
Reinhard Kolldehoff
Role: Lotus (voice)
Arnold Marquis
Role: Adm. Quency (voice)
Gerd Martienzen
Role: Mario Monta (voice)
Joachim Nottke
Role: Dr. Mabuse (voice)
Friedrich Schoenfelder
Role: Jason Monta (voice)
Siegfried Schürenberg
Role: Cmdr. Adams (voice)
Fritz Tillmann
Role: Dr. Krishna (voice)
Alexander Welbat
Role: Kaspar (voice)