Dr. Richard Stanton
Dr. Don Stanton
Dr. Jerry Lockwood
Dr. Jane Flynn
Susan Manners
Walter Gordon
Dr. Delmar
Dr. Paul Dryden
Dr. Frank Werner
Dr. Klinger
James O'Herli
David Wells
Dr. Sidney K. Fuller (as James K. Best)
Research Laboratory Manager (uncredited)
Susan's Photographer (uncredited)
Archibald Guiness (uncredited)