Nigel Stock
— Charles Dennistoun
Roland Curram
— Ronnie Cash
Caroline Blakiston
— Dr. Odile Keppler
Betty Cooper
— Betty Dennistoun
John Horsley
— Tom Dennistoun
Sibylla Kay
— Maid
Geraldine Newman
— Joan Dennistoun
Robin Phillips
— Dr. Willi Herstein
Donald Pickering
— Kenneth Dennistoun
Hugo Schuster
— Dr. Gerhardt Keppler