Bonita Granville
— Nancy Drew
John Litel
— Carson Drew
Frankie Thomas
— Ted Nickerson
Dickie Jones
— Killer Parkins
Mary Lee
— Mary Nickerson
Larry Williams
— Miles Lambert
Betty Amann
— Eula Denning
Thomas E. Jackson
— City Editor Bostwick
Olin Howland
— Police Sergeant Entwhistle
Sheila Bromley
— Bonnie Lucas
Hooper Atchley
— The Chemist (uncredited)
Irving Bacon
— Tracy (uncredited)
Sam Bagley
— Trainer (uncredited)
Al Bain
— Gym Spectator (uncredited)
Frankie Burke
— Beldenburg Hotel Bellboy (uncredited)
Nat Carr
— Dr. Carey (uncredited)
Glen Cavender
— Newspaper Office Worker / Beldenburg Hotel Passerby (uncredited)
Loia Cheaney
— Newspaper Office Worker (uncredited)
Steve Clark
— Pedestrian (uncredited)
Jimmy Conlin
— Newspaper Morgue-Keeper (uncredited)
Clyde Courtright
— Beldenburg Hotel Doorman (uncredited)
John Dilson
— Deputy Coroner (uncredited)
Edgar Edwards
— Drunk (uncredited)
Jimmie Fox
— Gym Trainer (uncredited)
Paul Fung
— Mandarin Cafe Waiter (uncredited)
Willie Fung
— Mandarin Cafe Proprietor (uncredited)
Chester Gan
— Mandarin Cafe Headwaiter (uncredited)
Jack A. Goodrich
— Photographer in Courtroom (uncredited)
Dick Gordon
— Courtroom Spectator (uncredited)
Sol Gorss
— Citizen Driver (uncredited)