Nils Asther

Dr. Julian Karell

Helen Walker

Eve Brandon

Reinhold Schünzel

Dr. Kurt van Bruecken

Paul Cavanagh

Dr. Henry Latimer

Konstantin Shayne

Dr. B.A. Vishanoff

Leyland Hodgson

Dr. G.B. Albertson

Edmund Breon

Sir Humphrey Brandon

Morton Lowry

Alan Guthrie

Matthew Boulton

Detective Inspector Ned Garth

Eustace Wyatt

Inspector Lawson