William Henry, Judith Barrett, William Collier Sr., Richard Denning, John Eldredge, Dorothy Tree, Anthony Quinn, Minor Watson, Morgan Conway, Byron Foulger, Chester Clute, Wolfgang Zilzer, Olaf Hytten, Hilda Plowright, Ottola Nesmith
A scientist invents a television device called the Iconoscope. Foreign agents hear about it and try to steal it.