The Three ions is a 1928 British sound drama film directed by Rex Ingram and starring Alice Terry, Iván Petrovich and Shayle Gardner. While the film has no audible dialog, it was released with a synchronized musical score with sound effects using both the sound-on-disc and sound-on-film process. The film was made as a quota film for Allied Artists and was based on a novel by Cosmo Hamilton. It was filmed on the French Riviera.