as Walter Parks Thatcher
as Doctor
as Mr. Saunders, Circus Club Manager
as Mr. Sturdevant
as Dr. Chatal
as Cardenas
as Ragheeb
as John Gurney
as Mr. Lingley
as Doc Ganson
as Supt. John R. Buckley
as Dr. Londe
as Dr. Byles
as Professor Godowski
as Dr. James Moran
