I watched the extras and it is HOURS of extras. If you ever wanted to talk to every witness, with visuals of the locations, maps, and all kinds of interesting and factual data relating to the story you now can. They have every police officer, including the one who stopped the Zodiac and let him get away and the two survivors who tell their stories and in one case walkes you through the actual crime scene where his girl friend was murdered.

It is absolutely intense. I sat glued from start to finish and couldnt pull away. It goes through the entire case, who the prime suspect was and yes kids you will get an answer to who they think the zodiac is and if it has been proven one way or the other. I do not want to ruin it but the documentary talks about things that are earth shattering and not covered in the film itself. I will also say that I believe the REAL Zodiac Killer could very likely have been one of those speaking in the documentary.

Seriously! Watch it. I honestly feel the documentary material alone could make for its own fantastic film. Did I mention I only touched on one small portion of what this 2 disc edition includes? Must buy people! I am tempted to give this movie a 10/10 but I dont want to get into that habit so a 9 it is, and based entirely on the extras which I never ever watch 99% of my thousand plus DVD collection