Chalk M for Murder: The Stockholm Film Review examines the film.
Chicago Sun-Times: M: Roger Ebert of the film "credited with forming two genres: the serial killer movie and the police procedural."
Fritz Lang's M: DVD review by Gary Morris calling it "a textbook classic restored to perfection."
Fritz Lang's M: Background information, storyline, political impact, history, pictures, and review.
M: DVD Times review of a 2003 rerelease.
M: Cast, crew, plot synopsis and review from the All Movie Guide.
M: Five star review with synopsis, cast/crew credits, and other background information from TV Guide Online.
M (1931): Full cast and crew for the film, and other information from the Internet Movie Database.