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A 13-year-old brainiac invents an ingenious listening device, which he uses to bring a crooked city official and his pals to justice
Edward Andrews
Mayor Massey
John Fiedler
Charles Blackburn
Lonny Chapman
Fred Benson
Eric Shea
Alvin Fernald
Clay O'Brien
Shoie
Kim Richards
Daphne 'Daffy' Fernald
Ted Gehring
Doyle Reager
Lynn Borden
Miss Pinkney
Claude Johnson
Mr. Fernald
Bebe Kelly
Mrs. Fernald
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