Planetarium Guide (uncredited)
Judge Prentiss
Dr. Gallen Altheim
Dr. Henry Bender
Dr. van Arken
Rankeillor
Duncan
Dr. Danson (uncredited)
Frank Smith
Storekeeper
Josiah Borden
Dr. Max Sherman
Minister
Museum Director Barton
Party Guest (uncredited)
Timothy Helgelander (uncredited)
Higgler
Dr. Galt (uncredited)
Professor O'Neill
Undertaker (uncredited)
Dr. Fawcette (uncredited)
George Rennit, private investigator
Mr. Briggs (uncredited)
Roger Bronson
Hastings' Butler (uncredited)
Herbert Carter
John Hayes
Frederick