Nancy Drew
Carson Drew
Challon
Theodore 'Ted' Nickerson
Captain Tweedy
Mary Eldredge
Effie Schneider, Drew's Maid
Hollister
Keiffer
Adam Thorne
Miss Tyson, the Nurse
Spud Murphy (uncredited)
Brinwood Student (uncredited)
Telegrapher (uncredited)
Miss Van Deering (uncredited)
Radio Station Technician (uncredited)
Radio Station Technician (uncredited)
Farmer (uncredited)
Brinwood Student with Black Hat (uncredited)
Dr. Raymond 'Ray' Spires (uncredited)
Mrs. Ray Spires (uncredited)
Brennan, the Gate Guard (uncredited)