Underground is a 1928 British sound drama film directed by Anthony Asquith and starring Brian Aherne, Elissa Landi, Cyril McLaglen, and Norah Baring. While the film has no audible dialogue, it was released with a synchronized musical score with sound effects, using both the sound-on-disc and sound-on-film process. The film examines the lives of ordinary Londoners and the romance between them, set on and around the London Underground.