For the Polish organization see Biuro Szyfrów, for the U.S. intelligence agency see Black Chamber.Cipher Bureau is a 1938 American film directed by Charles Lamont.Leon Ames plays the head of a listening agency in Washington DC dedicated to breaking up a foreign radio-spy ring, enlisting his naval-officer brother, and tangling with beautiful spies. The film was successful enough to cause a sequel, Panama Patrol.