Compared to secret agent Roy Miller, James Bond is a risk-averse, low-profile kind of guy. In "Knight and Day," Roy thinks nothing of leaping between fast-moving cars, diving off buildings, taking on dozens of bad guys at once or exchanging coy dialogue with his female co-star while ducking barrage after barrage of bullets. But then again, an audience will think nothing about this either because the stunt doubles and CG effects are all too obvious. With Tom Cruise and Cameron Diaz as the stars, no harm will ever come to the heroes; their hair won't even get mussed.