Henry O'Neill
— Dr. Everett Colner
Morris Ankrum
— Lt. Pat McKay
Arthur Space
— Burton Caighn Jr.
Paul Guilfoyle
— Dudley Badger
Dorothy Adams
— Mrs. Mary Abbott (uncredited)
Paul Langton
— Peter Selkin (uncredited)
William Tannen
— McKay's Assistant (uncredited)
Charles Thompson
— David Ranklin (uncredited)
John Vosper
— Dr. Elton Parkson (uncredited)
Jacqueline White
— Jean Smith (uncredited)