I could not get into it because of the initial premise about a code in crossword puzzles. Even in the 80's the cruciverbalists would have noticed and advertised this to the max. Today with blogs there's no way it would work. Also, to grimy brown.
Only one season of Rubicon and it wasn't picked up for a second season, but maybe the best show on television. Its a shame AMC can't attract the viewers. You will be hooked and the good news is it won't take too much of your time.