Boris Karloff
Dr. Laurence
Acting
Anna Lee
Dr. Clare Wyatt
Acting
John Loder
Dick Haslewood
Acting
Frank Cellier
Lord Haslewood
Acting
Donald Calthrop
Clayton
Acting
Cecil Parker
Dr. Gratton
Acting
Lyn Harding
Prof. Holloway
Acting
Clive Morton
Journalist
Acting
D.J. Williams
Landlord
Acting