Bonita Granville as Nancy Drew

John Litel as Carson Drew

Frankie Thomas as Ted Nickerson

Dickie Jones as Killer Parkins

Mary Lee as Mary Nickerson

Larry Williams as Miles Lambert

Betty Amann as Eula Denning

Thomas E. Jackson as City Editor Bostwick

Olin Howland as Police Sergeant Entwhistle

Sheila Bromley as Bonnie Lucas

Hooper Atchley as The Chemist (uncredited)

Irving Bacon as Tracy (uncredited)

Sam Bagley as Trainer (uncredited)

Al Bain as Gym Spectator (uncredited)

Frankie Burke as Beldenburg Hotel Bellboy (uncredited)

Nat Carr as Dr. Carey (uncredited)

Glen Cavender as Newspaper Office Worker / Beldenburg Hotel Passerby (uncredited)

Loia Cheaney as Newspaper Office Worker (uncredited)

Steve Clark as Pedestrian (uncredited)

Jimmy Conlin as Newspaper Morgue-Keeper (uncredited)

Clyde Courtright as Beldenburg Hotel Doorman (uncredited)

John Dilson as Deputy Coroner (uncredited)

Edgar Edwards as Drunk (uncredited)

Jimmie Fox as Gym Trainer (uncredited)

Paul Fung as Mandarin Cafe Waiter (uncredited)

Willie Fung as Mandarin Cafe Proprietor (uncredited)

Chester Gan as Mandarin Cafe Headwaiter (uncredited)

Jack A. Goodrich as Photographer in Courtroom (uncredited)

Dick Gordon as Courtroom Spectator (uncredited)

Sol Gorss as Citizen Driver (uncredited)

William Gould as The Judge (uncredited)

Eddie Graham as Pedestrian During Chase (uncredited)

Kit Guard as Man at Gym Counter (uncredited)

George Guhl as Policeman at Lambert Estate (uncredited)

Robert Haines as Courtroom Spectator (uncredited)

Florence Halop as Phyllis Gimble, Journalism Student (uncredited)

Charles Halton as Newspaper Publicity Man (uncredited)

Al Herman as Gym Spectator (uncredited)

Harry Hollingsworth as Policeman (uncredited)

Jack Kenney as Gym Spectator with Cigar (uncredited)

Johnny Kern as Gym Spectator (uncredited)

Paul King as Waiter (uncredited)

Joan Leslie as Mayme, Journalism Student (uncredited)

Al Lloyd as Pedestrian Outside Hotel (uncredited)

George Lloyd as Maxie, Gym Attendant (uncredited)

Charles Marsh as Beldenburg Hotel Engineer (uncredited)

Frank Mayo as Man Leaving Courthouse (uncredited)

Pat McKee as Admission Collector at Gym (uncredited)

Jack Mower as Deputy Coroner (uncredited)

Leonard Mudie as Deputy District Attorney Garrett (uncredited)

George Offerman, Jr. as Tribune Office Boy (uncredited)

Frank Orth as Captain Tweedy (uncredited)

Paul Panzer as Newspaper Office Worker (uncredited)

Bob Perry as Man at Gym Gate (uncredited)

Jack Perry as Soxie Anthens (uncredited)

Jessie Perry as Second Prison Matron (uncredited)

Renie Riano as Effie Schneider (uncredited)

John J. Richardson as Joe, Taxi Driver (uncredited)

John Ridgely as Beldenburg Hotel Desk Clerk (uncredited)

Betty Roadman as First Prison Matron (uncredited)

Cliff Saum as Policeman Outside Courthouse (uncredited)

Charles Smith as Charles, Journalism Student (uncredited)

Charles Sullivan as Gym Spectator (uncredited)

Elliott Sullivan as Pedestrian (uncredited)

Lois Verner as Theresa, Journalism Student (uncredited)

Jack Wagner as Jack, Journalism Student (uncredited)

Pat West as Jake, Gym Trainer (uncredited)

Leo White as Newspaper Office Worker (uncredited)

Jack Wise as Newspaper Office Worker (uncredited)

Walter Young as Dr. Hibbard (uncredited)