 Jacks sidekick, Harry, was originally to be played by  Ed Harris (I) (qv) and in this version was going to be revealed as  the mad bomber. However, when Ed Harris opted out, and  Jeff Daniels (I) (qv) signed, the producers felt that the audience  would not accept the sudden twist in character so Harry was kept as  a good guy throughout and the mad bomber written as a separate  character.