Omar
John R. Hodges
Miles Tatlock
Narrator, US version (voice)
Professor Wutheridge
Monty Woolley
John Graham
Edgar Brawley
Colonel William G. Smollett
Priam Farll
Madden Thomas
John Sidney Howard
Sheridan Whiteside
Doctor
Professor Lange
Parker (uncredited)
Henri Dubois
The Judge
Dr. Schmidt
Fouget
Gantvoort
Dr. Lane-Porteus
Jeweler
Dr. Jaffe
The Art Collector
Governor
Georges Bouchet
John Fleming
Dr. Oswald Vunch (uncredited)
Mr. Bawltitude
