The film is most fun when the hunt, as in National Treasure, squeezes Ben into such impossible situations as examining twin desks in the queen's chambers in Buckingham Palace and the White House's Oval Office, or kidnapping an American president (Bruce Greenwood) for a few minutes of frank talk. Helen Mirren, the previous year's Oscar winner for Best Actress, wisely joins the cast of a likely hit film as Ben's archaeologist mother, long-estranged from Voight's character but as feisty as the rest of the family. Returning director Turteltaub takes excellent advantage of his colorful backdrops in European capitals and the always-eerie Mount Rushmore, and oversees some wildly imaginative sets for this dramedy's feverish third act in an audacious and completely unexpected, legendary setting. If National Treasure 2: Book of Secrets doesn't feel quite as crisp and unique as its predecessor, it is still ingenious and wry enough to laugh a bit at itself. --Tom Keogh