Boris Karloff

~ as ~

Prof. Nathaniel Billings

Peter Lorre

~ as ~

Dr. Arthur Lorentz

Maxie Rosenbloom

~ as ~

Maxie

Jeff Donnell

~ as ~

Winnie Slade

Larry Parks

~ as ~

Bill Layden

Maude Eburne

~ as ~

Amelia Jones

Don Beddoe

~ as ~

J. Gilbert Brampton

George McKay

~ as ~

Ebenezer

Eddie Laughton

~ as ~

Mr. Johnson

Frank Puglia

~ as ~

Silvio Baciagalupi