Chandu consults his crystal ball and sees that Nadji, Princess of Egypt, is in danger. She is about to be sacrificed by the black magic cult of Ubasti. Headed for the magic island of Lemuria, he is shipwrecked , washed ashore and captured. He becomes invisible, escapes and after numerous detours is able to rescue the princess.
Bela Lugosi
Frank Chandler (Chandu)
Maria Alba
Nadji - Princess of Egypt
Murdock MacQuarrie
The Supreme Voice of Ubasti [Chs. 4-12]
Clara Kimball Young
Dorothy Regent
Dean Benton
Bob Regent (as Deane Benton)
Phyllis Ludwig
Betty Regent
Lucien Prival
Vindhyan, High Priest [Chs. 1-4]
Cyril Armbrister
Henchman Sutra [Chs.1-4]
Wilfred Lucas
Capt. Wilson [Chs. 4-12]
Josef Swickard
Tyba, The White Magician [Chs. 8-12]
Baby Peggy
Judy Allen
Dick Botiller
Morta
