Crispin Glover has to be one of the most unusual actors Hollywood has ever produced, and that's really saying a lot. Although many from Generation Y know him as the creepy "Thin Man" in the Charlie's Angels films, he is best known from his work in the 1980s as "George McFly," father to the time-traveling Michael J. Fox in Back to the Future. Glover refused to participate in the Back to the Future sequels, and won a landmark case against the films' producers (including a little-known director named Steven Spielberg) when they used an actor with prosthetics made to look like Glover as well as material from the first film.
His first appearance on Late Night with David Letterman has to be one of the most memorable of Dave's interviews:
His second interview took place over two years later:
Not long ago, Glover participated in an interview and talked about his first experience on Letterman's show. Granted, he didn't give any insights to his appearance: