Novelist Tom Clancy's character Jack Ryan has been brought to film three times before: once by Alec Baldwin, twice by Harrison Ford. Ben Affleck now embodies Ryan in the new Clancy adaptation, The Sum of All Fears. To accommodate Mr. Affleck's demographic, the character is now a young CIA analyst new to the agency. Despite his inexperience, Ryan is thrust into the center of a plot to pit the United States and Russia against each other in an all-out nuclear war. A neo-Nazi organization led by a sinister Austrian (Alan Bates, doing the best he can with a canned character) attempts to set the ball rolling with an attack on Ravens Stadium in Baltimore during the Super Bowl. This scene has been the focus of media attention. Although some of the debate is overblown (especially since so few critics will acknowledge the negative effect that images on film can have in other circumstances), the attack scene is resonant in a way that would have been impossible pre-9/11. The rest of the film is a mixed bag. The more weight the plot puts on Mr. Affleck, the less convincing he becomes. The fine supporting cast helps to fill the gaps-particularly Morgan Freeman as CIA director and Liev Schreiber as a "real" field agent.