In 1931, the film industry experienced significant changes, particularly with the rise of sound films. This year marked the release of iconic movies like Frankenstein, which introduced audiences to the horror genre in a new way, and City Lights, a silent film featuring Charlie Chaplin that showcased his comedic genius despite the growing popularity of talkies. Additionally, 1931 saw the debut of M, directed by Fritz Lang, which is considered one of the first psychological thrillers. The film's innovative use of sound and its exploration of dark themes influenced future filmmakers and set new standards for storytelling in cinema.