 For the last quarter of the movie, Maibaum added two chase scenes, with a helicopter and speedboats, and changed the location of Bond and Klebb's battle from Paris to Venice.Uncredited rewrites were contributed by Berkely Mather.Although uncredited, the actor who played Number 1 was Anthony Dawson, who had played Professor Dent in the previous Bond film, "Dr. No", and appeared in several of Terence Young's films.