I looked into the mystery of the real crystal skulls, and found the plot line pretty accurate. Many mysteries left for you in the first films (Example: What the heck happened to Indy's first girlfriend?) are answered. I gotta admit that some parts were a little bit over- exaggerated (Example: Mutt leading a pack of spider monkeys to attack the Russians), but this is the final installment, isn't it? A must see for all Indy/ historical-mystery fans. P.S. Don't let the 'Star Rating' fool you: Indiana Jones and the Kingdom of the Crystal Skull is easily twice as good as Ironman.