Jack Armstrong

John Hart

as

Jack Armstrong

Rosemary La Pl...

as

Betty Fairfield

Claire James

as

Princess Alura...

Joe Brown Jr.

as

Billy Fairfiel...

Pierre Watkin

as

Uncle Jim Fair...

Wheeler Oakman

as

Prof. Hobart Z...

Jack Ingram

as

Henchman Blair

Eddie Parker

as

Henchman Slade

Hugh Prosser

as

Vic Hardy