A major fault of the film is that there’s no German feeling to it. The cast, with the exception of German actress Doris Kunstmann as Eva Braun, is made up of British and Italian actors. The film’s interiors (and a few exteriors) were shot at Shepperton Studios, England.
What is good about the film is the treatment of Hitler by Alec Guinness, who gives perhaps the best portrayal yet of that bizarre figure. Even he, however, never conveys the fanaticism which Hitler certainly had and which he so powerfully conveyed to millions of susceptible German minds.
As the film [from Gerhard Boldt’s The Last Days of the Chancellery] revolves almost entirely around him, other cast members have to work hard to make even a momentary impression. The talent most lost in the shuffle is Simon Ward.
Most outstanding, considering her brief appearance, is Diane Cilento as a test pilot who gets across the authentic if misguided obsessive devotion to Der Fuehrer of some Germans.