While no regular bonus materials are provided on the disc, Paramount Home Entertainment’s DVD version of “Zodiac” also contains a hidden feature that is well worth checking out.

On the DVD’s Main Menu highlight the “Setup” menu entry. Periodically the menu entry will change to cypher with a flicker. At this time, press the “Enter” key on your remote control and you will get to a new page called “SF Chronological.” Select it and you can take a closer look at the Zodiac letters.