Moe Howard
— Moe
Larry Fine
— Larry
Curly Howard
— Curly
Lew Kelly
— Prof. J. O. Dunkfeather
Stanley Brown
— Wilson, the Reporter
Theodore Lorch
— Graves, the Inventor
Charles Middleton
— Graves' Valet
Stanley Blystone
— Spy Leader
Helen Servis
— Ultra-Thin Housewife
Symona Boniface
— Plumpish Housewife
Shirley Patterson
— Perkins, the Secretary
Heinie Conklin
— Devil Costume Spy
William Kelley
— Skeleton Costume Spy