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Aaron Stanford, 'Nikita'
You know him as: Computer genius Seymour Birkhoff / Why we like him: As "Nikita" works through its final season, Stanford is ready to bring Birkhoff's story to its conclusion. Huge props go out to Stanford for his ability to give Birkhoff the right balance of regret, shame, and compassion as viewers finally learn about his past. / Where else you've seen him: Will Traveler on "Traveler," Pyro in "X-Men: The Last Stand" and Doug Bukowski in "The Hills Have Eyes."