Character mistake: In the movie, Gregory Peck claims that he speaks German "perfectly." But in the scene where he uses the dead cliff guard's radio, he speaks with a noticeably thick - and highly un-German - accent. (00:57:22)
Character mistake: When Nanny says, "Look, here's Lucky!" the puppy she picks up does not have a collar on, therefore that cannot be Lucky, as Lucky is one of the original 15 with collars. (01:16:48)