John Hart
Jack Armstrong
Rosemary La Planche
Betty Fairfield
Claire James
Princess Alura [Chs. 3-6, 9-11, 15]
Joe Brown Jr.
Billy Fairfield (as Joe Brown)
Pierre Watkin
Uncle Jim Fairfield
Wheeler Oakman
Prof. Hobart Zorn
Jack Ingram
Henchman Blair
Eddie Parker
Henchman Slade
Hugh Prosser
Vic Hardy
EN