Top Billed Cast
Derek Farr
Ivan Mason / Dr. James Paxton
Ella Raines
Rhona Ellison
Donald Wolfit
Prof. Cattrell
Lisa Daniely
Nurse Mitzi
Bruce Beeby
Dr. Manning
Russell Napier
Scotland Yard Supt. Davidson
Cyril Cusack
Dr. Kelly
Frederick Piper
Medwood Inspector Hayman
Karl Stepanek
Dmitri Balinkev
Alfred Maron
Ambulance Driver
John Welsh
George White - the Gamekeeper
Olive Sloane
Mrs. Lemmin - the Landlady
