Tony Scott’s Crimson Tide (B+) is a fascinating look at the shades of gray that sometimes collide with a tightly regimented world. The movie’s conflict revolves around the mixed interpretation of an emergency signal and how two officers on a U.S. military submarine – Denzel Washington and Gene Hackman – clash in how to lead their men to handle their pressure-cooker situation. It’s a taut, well-written and action-packed thriller, all the more impressive in its tight space.