Dean Sawyer

Mayor Pompaño

Cecil Clark

Dill

Aldrich

Fogel

Michael Vanneau

R.B. Pulsifer Sr.

Governor

Arthur Timkin

Hotspur Shaner

Dr. Markheim

Dr. Curtis

Sam Griffin

Sullivan the Drunk

Society Gentleman

Myron Schultz

Mr. Waldron

Herr Kastner

Mr. Peabody

Bert Bixby

Mr. Hancock Otis Clinton

Nickleby

Sheriff Ned Meade

Magistrate

Sen. Creel

Dr. Harvey

B.J. Halstead

Hector Damson

Peter Haggerty

Wallace Brent

King Philip II

Brentwood Police Chief (uncredited)

Trent W. Winkle

Willis

Corelli

Hal Ormiston

Ed Balder

Beagle

Dr. Barnes

Wilbur Weedy

Drunk

Lester Westchester

Kreiger

Friedrich Kalkbrenner

Tom Tyler

Tom Gordon

George Hartley

Mr. Norris

M.K. Simmons (uncredited)

Max Lessing

McKenzie (uncredited)

George Peetwick

Cash Riddle

Professor Richards

Prof. Constant (voice) (uncredited)

Steve Conlon

Governor Tait

Hank Durban

Heinrich Himmler

J.P. Norton

Mr. Quill

Otto Horst

Radio Store Proprietor (uncredited)