Dr. Frank Overton
Mark Stevens
Dr. Helen Wieland
Marianne Koch
Inspector Prenton
Wolfgang Lukschy
Tony Stein
Joachim Hansen
Joan Overton
Delphi Lawrence
Sir Keith (as Walter Rilia)
Walter Rilla
Prof. Hubbard
John Longden
Martin, lab tech. (as Albert Ressler)
Albert Bessler
Dr. Karl Merkheimer (as Siegurd Lohde)
Sigurd Lohde
Sergeant Grun (as Woflgang Gunter)
Wolfgang Gunther
