Robin Williams gives a fine performance in One Hour Photo, but it remains just that: a performance, a tamping down of his familiar manic presence into the persona of the repressed, furtive Sy Parrish. He works in the photo processing department of SavMart, a vast and impersonal big box store. He lives alone, and his chief human contact is with his customers, who bring him their rolls of film to be developed. Their snapshots give him a glimpse into the lives of people who have families and children and celebrate events like weddings and birthdays. He also gets a glimpse of the secret lives of people, who bring in shots revealing their sexual proclivities, but he chooses to concentrate on the happy families, especially the Yorkins: the beautiful Nina (Connie Nielsen), her handsome husband, Will (Michael Vartan), and their cute 9-year-old son, Jakob (Dylan Smith). His admiration for the Yorkins grows into an obsession, and from that writer-director Mark Romanek spins the plot. One Hour Photo is supposed to be a thriller, in which we watch uneasily as Sy's obsession curdles into something malevolent. But by showing us Sy talking to the police at the start of the film, he deprives us of that surprise. There's a slackness in the narrative that works against the suspense, and Sy's breakdown and eruption into violence feels less like an integral part of the character than a plot device. Romanek also gets distracted into making a satiric point about the soullessness of the megacorporate entities embodied by SavMart, turning the store manager (Gary Cole) into the villain who pushes Sy over the edge. For many people, however, watching Williams perform is enough to overcome the movie's flaws.