Nancy Drew
Bonita Granville
Carson Drew
John Litel
Miss Tyson, the Nurse
Mae Busch
Spud Murphy (uncredited)
Tommy Bupp
Brinwood Student (uncredited)
Betty Jane Graham
Telegrapher (uncredited)
Stuart Holmes
Miss Van Deering (uncredited)
Vera Lewis
Radio Station Technician (uncredited)
Jack Mower
John Ridgely
Farmer (uncredited)
Cliff Saum
Brinwood Student with Black Hat (uncredited)
Joanne Tree
Dr. Raymond 'Ray' Spires (uncredited)
Brandon Tynan
Challon
James Stephenson
Mrs. Ray Spires (uncredited)
Lottie Williams
Brennan, the Gate Guard (uncredited)
Tom Wilson
Theodore 'Ted' Nickerson
Frankie Thomas
Captain Tweedy
Frank Orth
Mary Eldredge
Helena Phillips Evans
Effie Schneider, Drew's Maid
Renie Riano
Hollister
Charles Trowbridge
Keiffer
Dick Purcell
Adam Thorne
Edward Keane
Director
William Clemens
Story
Mildred Wirt Benson
Novel
Edward Stratemeyer
Screenplay
Kenneth Gamet
Dialogue
John Langan
Editor
Frank Magee
Art Direction
Stanley Fleischer
Producer
Bryan Foy
Director of Photography
L. William O'Connell
Music
Heinz Roemheld
Assistant Director
Lester D. Guthrie
Sound
Stanley Jones
Carolyn Keene
Costume Design
Milo Anderson