Claude Rains
Dr. Jack Griffin
Gloria Stuart
Flora Cranley
William Harrigan
Dr. Arthur Kemp
Henry Travers
Dr. Cranley
Una O'Connor
Jenny Hall
Forrester Harvey
Herbert Hall
Holmes Herbert
Chief of Police
E. E. Clive
Constable Jaffers
Dudley Digges
Chief Detective
Harry Stubbs
Inspector Bird
Donald Stuart
Inspector Lane
Merle Tottenham
Millie
Robert Adair
Detective Thompson (uncredited)
Edgar Barrier
Radio Announcer (uncredited)
