Maury (uncredited)

Superintendent (uncredited)

Durant (uncredited)

Unknown

Judge Robert Fellows (uncredited)

Airplane Designer (uncredited)

Orator

Mr. Coates (uncredited)

Ship's Captain (uncredited)

Captain Nils Helstrom

Dr. Lane Aboard SS Bellocona

Hopkins

The Judge (voice)

Man from District Attorney's Office (uncredited)

Gelsey

Prison Commissioner (uncredited)

Russell Carter

Bill

A Demonstrator